JP2019123334A - Reclining device and vehicle seat - Google Patents

Abstract

To prevent an armrest or a seat back from being locked in an anterior inclination posture and holds the armrest or the seat back in a rotatable state.SOLUTION: A reclining device 20 includes: a recliner 22 which is disposed on a rotation axis CL of a skeleton member (a side frame 14A) held rotatably relative to a vehicle and includes a lock mechanism which locks the skeleton member in a predetermined standing posture and an anterior inclination posture; a release lever 24 which is disposed on the rotation axis CL and rotates from a lock position to a release position to release the lock mechanism; biasing means which biases the release lever 24 to the lock position; and a pressing part (a release pin 28) which is formed at the skeleton member and presses the release lever 24 to rotate the release lever 24 from the lock position to the release position when the skeleton member rotates.SELECTED DRAWING: Figure 3

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a reclining device and a vehicle seat that couple an armrest and a seat back to a seat cushion in an adjustable manner.

  Patent Document 1 listed below describes a vehicle seat provided with a guide holding mechanism for holding the armrest in the storage posture and the use posture. In this guide holding mechanism, the movement of the guide pin on the guide groove is restricted by the movement restricting means. Thereby, the armrest can be held in the storage posture and the use posture.

JP, 2011-183878, A

  By the way, the angles of the seat back and the seat cushion do not necessarily coincide with each vehicle. For this reason, the storage posture and use posture of the armrest and the seat back may also differ depending on the vehicle. Therefore, it is difficult to use the guide holding mechanism described in Patent Document 1 in which the movement of the armrest is restricted in both the storage posture and the use posture for different vehicles.

  An object of the present invention is, in consideration of the above-mentioned fact, to hold the armrest or the seatback in a pivotable state without locking it in a forwardly inclined posture.

  The reclining device according to claim 1 is disposed on the rotation shaft of the framework member rotatably held relative to the vehicle, and includes a lock mechanism that locks the framework member in a predetermined standing posture and a forward tilting posture. A recliner, a release lever which is disposed on the pivot shaft and which pivots from the lock position to the release position to release the lock mechanism, biasing means which biases the release lever to the lock position, and the framework A pressing portion is formed on the member, and the pressing portion is configured to press the release lever at the time of rotation of the framework member to rotate the lock position to the release position.

  In the reclining device according to the first aspect, the frame member is locked by the lock mechanism of the recliner in the upright posture and the forward lean posture. When the release lever is pivoted from the lock position to the release position, the lock mechanism is unlocked, and the framework member can be pivoted from the standing posture to the forward leaning posture. Since the release lever is biased to the locked position by the biasing means, it returns to the locked position after the unlocking. For this reason, in the case of the configuration “without the pressing portion”, the skeletal member is locked by the recliner when it is pivoted to the forward inclined position.

  On the other hand, in the reclining device according to claim 1, the pressing portion is formed on the frame member. The pressing portion presses the release lever at the time of rotation of the framework member, and rotates the release lever from the lock position to the release position. For this reason, even if the frame member is pivoted to the forwardly inclined position, it is not locked by the recliner, and the pivotable state can be maintained.

  The reclining device according to claim 2 is the reclining device according to claim 1, wherein the release lever is pressed by the pressing portion and rotated to the release position before the frame member is rotated to the forward inclination position. Do.

  In the reclining device according to claim 2, when the frame member is rotated, the release lever is first pressed by the pressing portion, and the release lever is rotated from the lock position to the release position. This unlocks the recliner. When the framework member is further pivoted, the framework member pivots to the forwardly inclined position. That is, after the recliner is unlocked, the skeletal member pivots to the forwardly inclined position while maintaining the unlocked state. Thereby, it can suppress that a frame member is locked by a forward tilt posture.

  The reclining device according to claim 3 is the reclining device according to claim 1 or claim 2, wherein the pressing portion is a release pin fixed to the frame member and protruding in a direction intersecting with the turning direction of the release lever. .

  According to the reclining device of the third aspect, the release pin is fixed to the frame member. Further, the release pin protrudes in the direction intersecting with the rotation direction of the release lever. For this reason, the release pin is easy to press the release lever in the rotational direction.

  A vehicle seat according to a fourth aspect of the present invention comprises the reclining device according to any one of the first to third aspects, wherein the frame member constitutes a frame of an armrest.

  In the vehicle seat of claim 4, an armrest provided with the reclining device according to claim 1 or claim 2 is applied. That is, the armrest is not locked in the forward lean position. As a result, there is no need to release the release lever when returning the armrest to the upright position after using the armrest in the forwardly inclined position. In addition, when using the armrest, even if an impact is applied from above the armrest, the load on the recliner is unlikely to be applied.

  According to the reclining device and the vehicle seat according to the present invention, the armrest and the seat back can be held in a rotatable state without being locked in a forwardly inclined posture.

BRIEF DESCRIPTION OF THE DRAWINGS (A) is a perspective view which shows the state which made the center armrest the standing attitude | position in the vehicle seat which concerns on embodiment of this invention, (B) is a perspective view which shows the state which was made the forward inclination attitude. (A) is a perspective view showing a state in which a side frame as a frame member of a center armrest in a vehicle seat according to an embodiment of the present invention is in an upright posture, and (B) is in a forward inclined posture. It is a perspective view shown. (A) is a perspective view which shows the state which attached the reclining apparatus based on embodiment of this invention to the side frame, (B) is a perspective view which shows the state before an assembly. (A) is a perspective view which shows the releasing lever in the reclining apparatus based on embodiment of this invention, (B) is an elevation view which shows the positional relationship of a releasing lever and a releasing pin. FIG. 7 is an elevation view showing the reclining device according to the embodiment of the present invention in which the side frame is in the upright posture and the release lever is in the lock position. It is an elevation view showing the state where the release lever was rotated to the release position with the side frame in the upright posture in the reclining device according to the embodiment of the present invention. It is an elevation view which shows the state which the releasing pin of the side frame rotated in the reclining apparatus which concerns on embodiment of this invention, and the releasing lever which returned to the lock position contact | abut. It is an elevation view which shows the state which the release lever pressed by the release pin in the reclining apparatus based on embodiment of this invention rotated to the release position. FIG. 6 is an elevation view showing a state in which the side frame is pivoted to a forwardly inclined position in the reclining device according to the embodiment of the present invention. In the reclining device concerning the embodiment of the present invention, the release pin of a side frame contacts the end of a guide slot, and it is an elevation view showing the state where rotation of a side frame stopped. It is the elevation view which plotted the position of the release pin accompanying rotation of a side frame in the reclining apparatus which concerns on embodiment of this invention.

  Hereinafter, the vehicle seat 10 and the reclining device 20 according to the embodiment of the present invention will be described using FIGS. 1 to 11. In the drawings, an arrow FR indicates a sheet front direction, an arrow UP indicates a sheet upper direction, and an arrow W indicates a sheet width direction. The arrow IN indicates the inside in the sheet width direction. Hereinafter, when the description is simply made using front and rear, left and right, and upper and lower directions, unless otherwise noted, the front and rear directions of the seat, left and right of the seat left and right direction (sheet width direction), and up and down of the seat vertical direction Do.

<Vehicle seat>
As shown in FIG. 1 (A), in the vehicle seat 10 according to the present embodiment, a center arm rest 14 is disposed at the center of the rear seat 12 in the vehicle width direction. The center arm rest 14 is rotated by the recliner 22 (see FIG. 3B), and the upright posture (storage posture) shown in FIG. 1A or the forward lean posture (use posture) shown in FIG. It can be taken. The vehicle seat 10 is an application of a reclining device 20 including a recliner 22 as a pivoting mechanism of the side frame 14A, which is a frame member of the center arm rest 14.

  As shown in FIG. 2A, the frame member of the center armrest 14 is provided with left and right side frames 14A extending in the vertical direction on the left and right sides of the center armrest 14 in the upright posture. The upper ends of the left and right side frames 14A are connected in the seat width direction by the rear frame 14B.

  Further, the lower end portion of one side (the left side of the sheet in FIG. 2A) of the side frame 14A is rotatably connected to the side frame 12A of the adjacent rear seat 12 using a connecting shaft 16A.

  The lower end portion of the other side frame 14A (right side of the drawing in FIG. 2A) can be rotated via a recliner 22 described later with respect to the armrest bracket 14C fixed to the seat cushion frame 12C of the rear seat 12 Is linked to

<Reclining device>
The reclining device 20 is a control mechanism for rotating the side frame 14A or locking the rotation with respect to the armrest bracket 14C fixed to the vehicle. FIG. 3A shows a state in which the reclining device 20 according to the present embodiment is assembled to the side frame 14A and the armrest bracket 14C of the center arm rest 14. Moreover, the state before assembling the reclining device 20 with respect to side frame 14A and armrest bracket 14C is shown by FIG. 3 (B). The reclining device 20 includes a recliner 22, a release lever 24, and a release pin 28.

(Recliner)
The recliner 22 includes a base plate 22C and a ratchet plate 22A. The base plate 22C is located on the armrest bracket 14C side and is fixed to the armrest bracket 14C. Further, the ratchet plate 22A is positioned on the side frame 14A side and fixed to the side frame 14A. The base plate 22C and the ratchet plate 22A are formed in a disk shape, are disposed in a posture in which the axial direction is along the sheet width direction, and are relatively rotatably overlapped with each other around the rotation axis CL. Thus, the side frame 14A pivots about the pivot axis CL with respect to the armrest bracket 14C.

  Between the base plate 22C and the ratchet plate 22A, a lock mechanism (angle adjustment mechanism) (not shown) for adjusting the relative rotation angle of the ratchet plate 22A with respect to the base plate 22C is provided. The configuration of this lock mechanism is a well-known one so that detailed description is omitted. However, with this lock mechanism, the side frame 14A is in the standing posture (storage posture) shown in FIG. Locked in an inclined position (use position). Further, the side frame 14A is not locked in a state other than the storage attitude and the use attitude (between the position T1 and the position T3 in FIG. 11 described later), and can freely rotate.

  In the present embodiment, the “standing posture” and the “forward tilting posture” indicate the postures of the side frame 14A and the center armrest 14 at predetermined angles determined by the lock mechanism of the recliner 22, respectively.

  A center shaft 22B penetrates through the axial centers of the base plate 22C and the ratchet plate 22A. The axial direction one end (the paper surface right end of FIG. 3B) of the center shaft 22B penetrates the armrest bracket 14C and protrudes to the seat left side (the paper surface right of FIG. 3B) of the armrest bracket 14C. The release lever 24 is fixed to this projecting portion.

  When the center shaft 22B is rotated about the axis by a predetermined amount by the operation of the release lever 24, the lock mechanism of the recliner 22 is unlocked. This enables adjustment of the relative rotational angle of the ratchet plate 22A with respect to the base plate 22C, that is, adjustment of the rotational angle of the side frame 14A with respect to the seat cushion frame 12C shown in FIGS.

(Release pin)
The release pin 28 is an example of the pressing portion in the present invention, is attached to the side surface of the side frame 14A, and protrudes along the sheet width direction (direction substantially orthogonal to the rotation direction of the side frame 14A and the release lever 24). . The release pin 28 is inserted into a guide groove 14CA formed in the armrest bracket 14C. The guide groove 14CA is formed along a circular arc centering on the rotation axis CL of the center shaft 22B, and when the side frame 14A rotates, the release pin 28 rotates along the guide groove 14CA.

  In the present embodiment, the release pin 28 is separated from the side frame 14A and fixed to the side surface of the side frame 14A, but the embodiment of the present invention is not limited to this. For example, instead of the release pin 28, a convex portion integrally formed with the side frame 14A may be provided. By configuring in this manner, the number of parts necessary for the reclining device 20 can be reduced.

(Release lever)
As shown in FIGS. 4A and 4B, the release lever 24 extends outward from the base portion 24A in the sheet width direction from the base portion 24A in which the insertion hole 24H through which the center shaft 22B of the recliner 22 is inserted is formed. The handle portion 24B extended in the plane formed in the front and back direction and the up and down direction of the projecting sheet, and the base portion 24A projected outward in the sheet width direction and extended in the plane formed in the sheet front and back direction and the up and down direction And a pin receiver 24C.

  As shown in FIG. 4B, the separation distance L1 between the end surface 14AH on the outer side in the sheet width direction of the side frame 14A and the handle portion 24B is larger than the projection dimension L2 of the release pin 28 from the end surface 14AH. Further, the separation distance L3 between the end face 14AH and the pin receiving portion 24C is smaller than the projecting dimension L2.

  Further, as shown in FIG. 6, the pin receiving portion 24C is disposed more downstream than the two handle portions 24B in the turning direction when the side frame 14A is turned forward. Furthermore, when the side frame 14A is turned forward, it is disposed at a position where it abuts against the release pin 28 fixed to the side frame 14A.

<Operation of reclining device>
Next, the operation of the reclining device 20 when rotating the side frame 14A will be described. FIG. 5 shows the side frame 14A locked by the recliner 22 in the upright position. The release lever 24 is biased in the direction indicated by the arrow M by biasing means (not shown) and is fixed in the locked position. Thereby, the lock state of the lock mechanism in the recliner 22 is held. In the present embodiment, the biasing means is a coil spring interposed inside the recliner 22, but the configuration of the biasing means is not particularly limited, and a spring or the like can be used as appropriate.

  In order to turn the side frame 14A, as shown in FIG. 6, the release lever 24 is turned in the direction (the direction indicated by the arrow N) in which the side frame 14A tends to fall against the biasing force of the coil spring. Move it. As a result, the rotational force is transmitted from the release lever 24 to the ratchet plate 22A (see FIG. 3B) via the center shaft 22B, and the locked state of the lock mechanism is released.

  At this time, a rotation angle (rotational stroke) necessary to release the locked state of the lock mechanism is set as an angle θ1, and a position of the release lever 24 rotated an angle θ1 or more from the lock position is set as a release position. In the release position, the release lever 24 can hold the unlocked state of the recliner 22 with respect to the lock mechanism.

  When the side frame 14A is pivoted, as shown in FIG. 7, the side frame 14A falls to the seat front side, while the release lever 24 is pivoted by the coil spring in the arrow M direction and pulled back to the lock position. Then, the release pin 28 fixed to the side frame 14A abuts on the pin receiving portion 24C of the release lever 24.

  As shown in FIG. 8, when the pin receiving portion 24C of the release lever 24 is pressed by the release pin 28, the release lever 24 pivots in the arrow N direction to the release position.

  When the side frame 14A is turned in a state where the lock mechanism of the recliner 22 is released by the release lever 24, as shown in FIG. 9, the side frame 14A is turned to a predetermined forward inclined posture determined by the lock mechanism. . At this time, since the release pin 28 is in the release position, the lock mechanism of the recliner 22 is unlocked. For this reason, the side frame 14A is not locked in the forward inclined position, and can further rotate as shown in FIG. In the state shown in FIG. 10, the release pin 28 abuts on the groove wall at the end of the guide groove 14CA, and the rotation is stopped.

(Action / effect)
The operation of the reclining device 20 described above will be summarized using FIG. First, in the standing posture (position T1) of the side frame 14A, the release lever 24 is operated to release the lock mechanism. When the side frame 14A pivots to the forward inclined position, the release pin 28 of the side frame 14A abuts on the pin receiving portion 24C of the release lever 24 in the lock position (position T2). When the release pin 28 presses the pin receiving portion 24C and the release lever 24 rotates by an angle θ1, the lock mechanism is released (position T3).

  By continuing to rotate the side frame 14A, the side frame 14A is inclined forward, but since the release lever 24 is in the release position, the lock mechanism does not operate (position T4). Then, by continuing to turn the side frame 14A further, the release pin 28 abuts on the groove wall at the end of the guide groove 14CA, and the rotation is stopped (position T5). In the following description, the attitude of the side frame 14A at the position T5 may be referred to as a stop attitude.

  As described above, according to the reclining device 20 according to the present embodiment, by releasing the lock mechanism of the recliner 22, it is possible to suppress the side frame 14A from being locked in the forward inclined posture. Therefore, for example, as shown by a two-dot chain line 14D in FIG. 11, the use angle of the side frame 14A can be arbitrarily set by appropriately adjusting the end position of the guide groove 14CA. This allows the same recliner 22 to be applied to different center arm rests.

  In addition, since the side frame 14A is not locked in the forward lean position, there is no need to operate the release lever 24 when returning the center arm rest 14 to the upright position after use. Therefore, it is possible to easily return to the standing posture.

  Furthermore, as shown in FIG. 1 (B), when the rear seat 12 is to be turned forward while the center arm rest 14 (side frame 14A) is in the forward inclined posture or the stop posture, the rear seat 12 and the connecting shaft 16A ( It can suppress that the center armrest 14 connected by FIG. 2 (A) contact | abuts on the cushion seat 16, and it will be in the state which can not overturn the rear seat 12. FIG.

  Furthermore, according to the reclining device 20, the release pin 28 abuts against the groove wall of the guide groove 14CA in a state where the lock mechanism of the recliner 22 is released, and the rotation of the side frame 14A is stopped (FIG. 11, position T5). Therefore, when a large external force is applied to the center arm rest 14 from above, the external force is not easily input to the recliner 22. Thus, the recliner 22 can be protected.

  In addition, in this embodiment, although the reclining apparatus 20 is used in order to control rotation of the side frame 14A in the center armrest 14, the embodiment of the present invention is not limited to this. For example, the reclining device 20 may be used to control the rotation of the side armrest, or may be used to control the rotation of the rear seat 12 or the front seat. That is, by using the reclining device 20, the recliner 22 can be diverted to various applications.

  Further, in the present embodiment, as shown in FIG. 11, the release lever 24 is pressed by the release pin 28 before the side frame 14A pivots to the forward inclined position (before reaching the position T4), and the release position ( Although it shall rotate to position T3), an embodiment of the present invention is not restricted to this. For example, with the position T3 aligned with the position T4, the timing at which the side frame 14A pivots to the forward tilt attitude (timing to reach the position T4) and the timing at which the release lever 24 pivots to the release position (position T3) You may match.

10 Vehicle seat 14A side frame (frame member)
CL rotation shaft 20 reclining device 22 recliner 24 release lever 28 release pin 14 center armrest (armrest)

Claims (4)

A recliner having a lock mechanism disposed on a pivot shaft of a framework member rotatably held relative to a vehicle and locking the framework member in a predetermined standing posture and a forward tilting posture;
A release lever which is disposed on the pivot shaft and pivots from a lock position to a release position to release the lock mechanism;
Biasing means for biasing the release lever to the locked position;
A pressing portion which is formed on the frame member and which presses the release lever when the frame member is pivoted to pivot from the lock position to the release position;
Reclining device with.   2. The reclining device according to claim 1, wherein the release lever is pressed by the pressing portion and rotated to the release position before the frame member is rotated to the forward tilt posture.   The reclining device according to claim 1 or 2, wherein the pressing portion is a release pin fixed to the frame member and protruding in a direction intersecting the rotation direction of the release lever. A reclining device according to any one of claims 1 to 3, comprising:
The frame member constitutes a frame of an armrest,
Vehicle seat.