JP4984966B2 - Vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simply constitute a mechanism for reducing a speed of the movement of the rotation of a seat back in a front raising direction by energizing not to gain too much momentum. <P>SOLUTION: This seat has an energizing member for energizing the seat back 2 in the front raising and rotating direction and a speed reducing mechanism for reducing the speed of the movement that the seat back 2 is raised to the front by the energization. The speed reducing mechanism reduces the speed of the movement of the seat back 2 since a pressing member 20 provided on the seat back 2 side imparts a frictional resisting force by sliding to a fixed side ring 40 provided integrally with a seat cushion 3. The pressing member 20 is pressed to the fixed side ring 40 by the action of inertia force when the momentum is gained in the movement that the seat back 2 is raised to the front by energizing force of the energizing member, and the frictional resisting force when sliding the pressing member 20 is increased. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention relates to a vehicle seat. Specifically, the present invention relates to a vehicle seat configured such that a backrest angle can be adjusted and moved by a reclining device connected to the seat back.

Conventionally, in order to assist the adjustment operation of the backrest angle of the seat back, the vehicle seat has been provided with a spring member that always raises the seat back and biases it in the turning direction. As a result, the seat back is naturally raised by the biasing of the spring member in accordance with the operation of releasing the lock of the reclining device.
Here, the following Patent Document 1 discloses a technique for decelerating the movement of the movable body that is raised by the urging force of such a spring member so that the movement is not excessively applied. In this disclosure, the entire sheet as a movable body is raised from the floor by the urging force of the spring member and stored. The hinge structure that connects the seat and the floor is provided with a damper mechanism that decelerates so that the movement of raising the seat does not give too much bounce.

JP 2005-186642 A

  However, in the related art disclosed above, since the movement of the movable body is decelerated using a complicated structural component such as a damper mechanism, such a configuration becomes complicated.

  The present invention was devised as a solution to the above-described problems, and the problem to be solved by the present invention is that the movement of the seat back rotating in the forward raising direction due to the bias is added. The purpose of this is to simply configure a mechanism that decelerates so as not to pass.

In order to solve the above problems, the vehicle seat of the present invention takes the following means.
A first aspect of the present invention is a vehicle seat configured such that a seat back can be adjusted and moved by a reclining device connected to the seat back. The vehicle seat includes an urging member that urges the seat back in the forwardly rotating direction, and a speed reducing mechanism that decelerates the movement of the seatback that rotates in the forwardly activating direction by the urging force of the urging member. And having. In this reduction mechanism, a movable body provided to move integrally with the seat back reduces the movement of the seat back by applying a frictional resistance force by sliding to a fixed body such as a seat cushion. It is the composition to do. This movable body is pressed against the fixed body by the action of the inertial force when the urging force of the urging member gives rise to the forward movement of the seat back in the rotational direction, increasing the frictional resistance force when sliding. It is the composition which makes it. The movable body has a pressing member and an arm swinging member. The pressing member applies a frictional resistance force by sliding by being pressed against the fixed body. The arm swinging member is provided on the seat back so as to be able to swing the arm, and has a cam-shaped outer peripheral surface capable of pressing the pressing member against the fixed body by the arm swinging motion. The arm swinging member has a weight at the tip of the arm swinging, and is adapted to swing the arm by receiving the action of inertial force when the seat back is raised in the movement direction in the turning direction.
According to the first aspect of the invention, the movable body is pressed against the fixed body by receiving the action of the inertial force when the urging force of the urging member urges the forward movement of the seat back in the rotational direction. It is done. As a result, the movable body applies a frictional resistance force due to the sliding to the fixed body, and the movement of the seat back that is raised up is decelerated. Specifically, the arm swinging member having a weight at the tip performs a swinging motion by the action of an inertial force when the forward movement of the seat back moves in the rotational direction. Thereby, a press member is pressed by the outer peripheral surface formed in the cam shape of the arm swing member, and is pressed against a fixed body.

Next, in a second aspect based on the first aspect described above, the reclining device has first and second disk-shaped connecting members and an annular outer periphery clamping member. The first connecting member is integrally connected to the seat back. The second connecting member is provided in such a manner that the first connecting member and the disk surface are opposed to each other, and is integrally connected to a stationary member such as a seat cushion. The outer periphery clamping member is provided in a shape surrounding the outer peripheral edges of the two connecting members, and clamps them in the thickness direction in a state where the relative rotation of the two connecting members is allowed. The outer periphery clamping member is integrally coupled in a circumferential direction with a second coupling member that is integrally coupled with a stationary member such as a seat cushion. And a fixed body is comprised as an annular member integrally assembled | attached to this and the circumferential direction along the outer periphery of an outer periphery clamping member.
According to the second aspect of the present invention, the fixed body is disposed in an integral state with the outer peripheral edge of the annular outer peripheral clamping member that is a component of the reclining device.

The present invention can obtain the following effects by taking the above-described means.
First, according to the first invention, a configuration in which a resistance force due to sliding friction is applied to the movement of the seat back by using the action of an inertial force when the forward movement of the seat back in the rotational direction is elastic. By doing so, a mechanism for decelerating the movement of the seat back so as not to give too much bounce can be configured simply.
Furthermore, according to the second invention, the fixed body is disposed along the outer peripheral edge of the annular outer periphery holding member which is a component of the reclining device, so that the sliding surface for sliding the movable body is rationalized. And can be set compactly and compactly .

  Embodiments of the best mode for carrying out the present invention will be described below with reference to the drawings.

First, the configuration of the vehicle seat 1 according to the first embodiment will be described with reference to FIGS.
Here, FIG. 1 is a perspective view showing a schematic configuration of the vehicle seat 1 of the present embodiment. The vehicle seat 1 includes a seat back 2 serving as a backrest portion, a seat cushion 3 serving as a seating portion, and a headrest 4 serving as a head receiving portion. Here, the seat back 2 is connected to the seat cushion 3 by the reclining devices 10 and 10 provided at the lower portions of both sides in the width direction.
These reclining devices 10 and 10 are normally held in a locked state in which the backrest angle of the seat back 2 is fixed. The reclining devices 10 and 10 are operated to release the above-described locked state by performing an operation of pulling up the operation lever L at a lower position on the right side of the seat cushion 3 in the drawing. Here, the reclining devices 10 and 10 are connected to each other by the rod R so that the operation parts for unlocking are connected to each other, and the switching operation of the lock / release is performed synchronously on the left and right. Therefore, by performing the operation of pulling up the operation lever L, the locked state of the reclining devices 10 and 10 is simultaneously released, so that the fixed state of the backrest angle of the seat back 2 can be released. Thereby, the adjustment movement of the backrest angle of the seat back 2 can be performed.

Here, a torsion spring Ss (see FIG. 3) is hooked between the seat back 2 and the seat cushion 3. Although the details will be described later, the torsion spring Ss is normally urged in the rotation direction (in the direction of the arrow in FIG. 1) for raising the seat back 2 forward. Therefore, for example, when the seat back 2 is held in the rearward tilted position shown by the phantom line in the figure, the operation of pulling up the operation lever L causes the seat back 2 to be Naturally wakes up from this position.
At this time, the seat back 2 that is raised from the rearward tilting position normally has a higher rotational speed due to the movement of the raised movement with the movement of the center of gravity during the movement. It will become. However, in the configuration of the present embodiment, a speed reduction mechanism is provided that can decelerate so that the movement of the seat back 2 being raised does not give too much momentum.
Hereinafter, the configuration of the speed reduction mechanism will be described in detail.

Here, FIG. 2 shows the internal structure of the vehicle seat 1 as a cross-sectional view taken along the line II-II in FIG. 3 shows a connecting structure of the seat back 2 and the seat cushion 3 by the reclining device 10 as a sectional view taken along the line III-III in FIG.
As shown in these drawings, the back frame 2 f forming the skeleton of the seat back 2 is connected to the cushion frame 3 f forming the skeleton of the seat cushion 3 by the reclining device 10. As a result, the seat back 2 is rotated with respect to the seat cushion 3 around the center of the reclining device 10 by releasing the locked state of the reclining device 10. A specific configuration of the reclining device 10 will be described in detail later.
Here, as shown in FIG. 2, the rotational movement (backward tilting movement) of the seat back 2 with respect to the seat cushion 3 in the clockwise direction shown in the figure is performed by the L-shaped frame 2L provided integrally with the back frame 2f. The cushion frame 3f is regulated by abutting against a locking portion 3j formed at the upper right end of the cushion frame 3f. Then, the rotational movement (forward tilting movement) of the seat back 2 with respect to the seat cushion 3 in the illustrated counterclockwise direction is a relationship in which the L-shaped frame 2L is formed at the upper left end of the cushion frame 3f. It is regulated by coming into contact with the stop 3k. That is, the relative rotational movement of the seat back 2 with respect to the seat cushion 3 is made possible in the region between the locking portion 3j and the locking portion 3k with which the L-shaped frame 2L abuts.
Here, as shown in FIG. 3, there is a torsion spring between the L-shaped frame 2L integrally fixed to the back frame 2f and the L-shaped frame 3L provided integrally with the cushion frame 3f. Ss is applied. The torsion spring Ss is provided in a state of being pre-twisted, and an end portion on the center side is hooked on the L-shaped frame 3L, and an end portion on the outer peripheral side is hooked on the L-shaped frame 2L. ing. As a result, as shown in FIG. 2, the seat back 2 is urged in a rotational direction in which the seat back 2 is raised up with respect to the seat cushion 3.

The back frame 2f is provided with an arm-shaped pressing member 20 and an arm swinging member 30 that constitute a speed reduction mechanism.
The former pressing member 20 is pivotally supported on the back frame 2f by the connecting shaft 23 at the end of the arm-like root side. As shown in FIG. 3, the pressing member 20 is disposed so as to be sandwiched between the plate surfaces of the L-shaped frame 2 </ b> L and the back frame 2 f. Returning to FIG. 2, a sliding portion 21 is formed at the end of the pressing member 20 on the front end side so as to be brought into contact with the outer peripheral surface of the annular fixed side ring 40 provided integrally with the cushion frame 3 f. Has been. The sliding portion 21 is configured to be able to apply a frictional resistance force by sliding against the movement of the seat back 2 rotating by contact with the outer peripheral surface of the fixed side ring 40.
The stationary side ring 40 is integrally welded to the outer peripheral ring 15 that is a component of the reclining device 10, and thereby has an integral structure with the cushion frame 3 f. Specifically, the stationary ring 40 is fitted and disposed along the outer peripheral edge of the outer peripheral surface portion 15 c so as to surround the outer peripheral surface portion 15 c of the outer peripheral ring 15. Here, the fixed side ring 40 corresponds to the fixed body of the present invention.
As shown in FIG. 3, the latter arm swinging member 30 includes an arm portion having a weight 31 attached to an end portion on the distal end side, which is the lower end side in the drawing, and a cam portion 32 having a cam-shaped outer peripheral surface. And having. These are integrally connected to each other by a connecting shaft 33 and are pivotally supported with respect to the back frame 2f. And the cam part 32 is arrange | positioned in the state in which the cam-shaped outer peripheral surface contacted the back surface part 22 of the press member 20. As shown in FIG.

As shown in FIG. 2, the arm swinging member 30 having the above configuration has a weight 31 attached to the tip of the arm portion, so that the movement of the seat back 2 being lifted up tends to give a spring. In response to the inertial force, the arm swings (rotates). In other words, when the arm swinging member 30 tries to give rise to the movement of the seat back 2 being raised, the arm portion with the weight 31 rotates about the connecting shaft 33 in the counterclockwise direction shown in the figure. . As a result, the cam portion 32 is also integrally rotated in the counterclockwise direction in the drawing, and the back portion 22 of the pressing member 20 is pressed by the swelled portion of the outer peripheral surface of the cam shape. And the pressing member 20 will be in the state by which the sliding part 21 was pressed on the outer peripheral surface of the stationary side ring 40 by the back surface part 22 being pressed.
The force with which the sliding portion 21 is pressed against the outer peripheral surface of the fixed side ring 40 increases as the movement of the seat back 2 tends to bounce. Therefore, in such a case, a resistance force due to a large sliding friction is applied to the movement of the seat back 2 rotating. Thereby, since the rotational movement of the seat back 2 is decelerated, the movement is suppressed so that the movement is not excessively applied.

Next, the structure of the reclining apparatuses 10 and 10 is demonstrated using FIGS. Each reclining device 10, 10 has a symmetric configuration, but the substantial configuration is the same. Therefore, in the following description, only the configuration on one side shown in FIGS. 3 to 7 will be described.
Here, FIG. 4 shows an exploded perspective view of the reclining device 10. Note that the reclining device 10 shown in FIG. 4 is shown in the right and left direction opposite to that of the reclining device 10 shown in FIG. As shown in the figure, the reclining device 10 includes a generally disc-shaped ratchet 11 and a guide 12, a push-pull member 13 and poles 14 and 14 disposed between these disc surfaces, The ratchet 11 and the outer peripheral ring 15 sandwiching the guide 12 are assembled into one. The assembled state of the reclining device 10 is shown in FIG. Here, the ratchet 11 corresponds to the first connecting member of the present invention, the guide 12 corresponds to the second connecting member of the present invention, and the outer peripheral ring 15 corresponds to the outer peripheral clamping member of the present invention.
Hereinafter, the configuration of each component will be described in detail.

First, the configuration of the ratchet 11 will be described. That is, as shown in FIG. 4, the ratchet 11 is formed in a substantially disk shape.
The ratchet 11 is formed in a shape in which a disk-shaped outer peripheral edge portion protrudes in a cylindrical shape by half punching in the plate pressure direction (axial direction). And the internal tooth 11g is formed in the internal peripheral surface of the site | part which protruded in this cylindrical shape. Thereby, the outer peripheral part of the ratchet 11 is formed as an internal gear protruding in a cylindrical shape. And the through-hole 11h penetrated in the plate | board thickness direction is formed in the disk-shaped center part of the ratchet 11. As shown in FIG.
As shown in FIG. 3, the ratchet 11 is integrally connected to the seat back 2 by joining the outer surface of the ratchet 11 to the plate surface of the back frame 2 f forming the skeleton of the seat back 2. Here, as shown in FIG. 4, dowels 11 a... And D dowels 11 b protrude from the outer plate surface of the ratchet 11 at a plurality of locations in the circumferential direction. The D dowel 11b is formed in a shape in which a part of the protruding shape is cut out in a D-shaped cross section, and the shape is distinguished from the dowel 11a protruding in a cylindrical shape. . On the other hand, as shown in FIG. 3, dowel holes 2 a .. and D dowel holes 2 b into which these dowels 11 a... And D dowels 11 b can be fitted are formed through the back frame 2 f. Therefore, the ratchet can be obtained by welding and joining these dowels 11a... And D dowels 11b to the dowel holes 2a .. and D dowel holes 2b formed in the back frame 2f. 11 and the back frame 2f are firmly and integrally connected.
Note that a through hole 2c is formed in the back frame 2f at a position concentric with the through hole 11h formed in the ratchet 11.

Next, returning to FIG. 4, the configuration of the guide 12 will be described. The guide 12 is formed in a substantially disk shape having an outer diameter slightly larger than that of the ratchet 11.
As with the ratchet 11, the guide 12 is formed in a shape in which a disk-shaped outer peripheral edge protrudes in a cylindrical shape by half punching in the plate thickness direction (axial direction). As shown in FIG. 3, the guide 12 is assembled in the shape of the ratchet 11 so that the inner surface of the ratchet 11 and the inner surface of each other overlap each other. It can be assembled in a state of surrounding the outer peripheral edge portion. Thus, the guide 12 can be held in a state in which the relative movement in the radial direction of the ratchet 11 is restricted by the inner peripheral surface 12n of the outer peripheral edge portion protruding in the cylindrical shape. Returning to FIG. 4, a through hole 12 h penetrating in the thickness direction is formed at the center of the disk shape of the guide 12.
As shown in FIG. 3, the guide 12 is integrally connected to the seat cushion 3 by joining the outer surface of the guide 12 to the plate surface of the cushion frame 3 f forming the skeleton of the seat cushion 3. Here, as shown in FIG. 4, dowels 12 a... And D dowels 12 b are formed on the outer surface of the guide 12 at a plurality of locations in the circumferential direction. The D dowel 12b is formed in a shape in which a part of the projecting shape is cut out in a D-shaped cross section, and the shape is distinguished from the dowel 12a that projects in a cylindrical shape. . On the other hand, as shown in FIG. 3, the cushion frame 3f is formed with dowel holes 3a and D dowel holes 3b through which the dowels 12a and D dowels 12b can be fitted. Accordingly, the dowels 12a,..., And the D dowels 12b are welded and joined to the dowel holes 3a,..., And the D dowel holes 3b formed in the cushion frame 3f. 12 and the cushion frame 3f are firmly and integrally connected.
In the cushion frame 3f, a through hole 3c is formed at a position concentric with the through hole 12h formed in the guide 12.

Returning to FIG. 4, a groove portion 12 d that is recessed in a “ten” symbol shape is formed on the inner plate surface of the guide 12 by half-punching in the plate thickness direction (axial direction). The push-pull member 13 and the poles 14 and 14 are accommodated in the groove 12d so as to be slidable.
Here, FIG. 6 shows a state where the push / pull member 13 and the poles 14 and 14 are accommodated in the groove 12d of the guide 12. As shown in the figure, poles 14 and 14 are respectively housed and disposed in the recessed regions on the upper and lower sides of the groove 12d. In the central portion of the groove portion 12d, the push / pull member 13 is accommodated and disposed so as to straddle the right and left depression regions in the figure. As a result, the pole 14 housed and arranged on the upper side in the drawing is in a state of being brought into contact with the guide portions 12g and 12g formed to project on both sides. The pole 14 housed and arranged on the lower side in the figure is in a state of being brought into contact with the guide portions 12g and 12g formed to project on both sides. Similarly, the push / pull member 13 has its left and right end portions in contact with the guide portions 12g and 12g and the guide portions 12g and 12g that are formed to protrude from the upper and lower sides thereof. .
Here, the width dimensions between the left and right guide parts 12g, 12g and the guide parts 12g, 12g (the dimension between the left and right sides) on the upper and lower sides in the figure are almost slightly larger than the width dimensions of the poles 14, 14. They are set to the same size. The widths between the upper and lower guide portions 12g, 12g and the guide portions 12g, 12g on the right side and the left side in the figure (the vertical dimension) are substantially the same as being slightly larger than the vertical width dimension of the push / pull member 13. The size is set.
As a result, as shown in FIG. 7, the poles 14 and 14 are guided by the guide portions 12g and 12g or the guide portions 12g and 12g that are in contact with both sides of the poles 14 and 14 while the radius inside the shape of the groove portion 12d. It can be slid only in and out of the direction (vertical direction in the figure). Further, the push-pull member 13 slides only in the left-right direction (radial direction) in the shape of the groove portion 12d while being guided by the guide portions 12g, 12g or the guide portions 12g, 12g that are brought into contact with the left and right ends thereof. It can be moved.

Next, returning to FIG. 4, the configuration of the poles 14 and 14 will be described.
These poles 14 and 14 are formed in a flat plate shape. And the outer teeth 14g and 14g which can mesh | engage with the inner tooth 11g formed in the ratchet 11 are formed in the outer peripheral surface part of each pole 14 and 14, respectively. And each pole 14 and 14 is formed in the shape by which those inner peripheral surface parts were thinned. Then, hooks 14k and 14k that are pulled by the push / pull member 13 are formed to protrude in the hollowed space. Then, leg portions 14b and 14b and leg portions 14b and 14b that are pushed by the push-pull member 13 are formed on both side portions of the inner peripheral surface portions of the poles 14 and 14, respectively, by this hollow shape.

Next, the configuration of the push / pull member 13 will be described.
The push / pull member 13 is formed in a flat plate shape. Hook-shaped pulling portions 13q and 13q that can hook the hooking portions 14k and 14k formed on the poles 14 and 14 are formed at the center portions on the upper and lower sides of the push / pull member 13 in the figure. Yes. As shown in FIGS. 6 and 7, the pulling portions 13q and 13q are moved by the push / pull member 13 from the slide position shown in FIG. 6 toward the slide position shown in FIG. The hooks 14k and 14k formed in the above are hooked to draw them inward in the radial direction. Thereby, each pole 14 and 14 can be removed from the meshing state with the internal teeth 11g of the ratchet 11.
Returning to FIG. 4, the leg portions 14 b and 14 b and the leg portions 14 b and 14 b of the poles 14 and 14 are provided on both sides of each portion where the pulling portions 13 q and 13 q of the push-pull member 13 are formed. Recessed portions 13d and 13d and recessed portions 13d and 13d that can be pulled in are formed. As shown in FIG. 7, the depressions 13 d and 13 d and the depressions 13 d and 13 d are arranged so that the poles 14 and 14 are pulled inward in the radial direction by the pulling parts 13 q and 13 q, respectively. , 14 are pulled in and the leg portions 14b, 14b are retracted to permit their sliding movement.
Then, returning to FIG. 4, the leg portions 14b of the poles 14 and 14 are formed on the left shoulder portions of the depressions 13d and 13d and the depressions 13d and 13d as shown in FIG. The push portions 13p and 13p and the push portions 13p and 13p are formed, respectively, which can push the 14b and the leg portions 14b and 14b outward in the radial direction. As shown in FIG. 7, the pushing portions 13p and 13p and the pushing portions 13p and 13p are formed by the leg portions 14b and 14b and the leg portions 14b and 14b of the poles 14 and 14, respectively, and the depression portions 13d and 13d and the depression portion 13d. , 13d, the push-pull member 13 is moved to the slide position shown in FIG. 6 to push up the leg portions 14b, 14b and the leg portions 14b, 14b of the poles 14, 14 in the radial direction. It pushes outward. As a result, the external teeth 14g, 14g of the poles 14, 14 are held in a state of being engaged with the internal teeth 11g of the ratchet 11, respectively.

  Each pole 14, 14 meshes with the internal teeth 11 g of the ratchet 11, so that the relative rotation of the ratchet 11 with respect to the guide 12 is restricted. That is, each of the poles 14 and 14 meshing with the inner teeth 11g of the ratchet 11 is housed inside the groove 12d with respect to the guide 12, and thus movement in the circumferential direction is restricted. It is in a state. As a result, the relative rotation of the ratchet 11 relative to the guide 12 is restricted via the poles 14 and 14. However, as shown in FIG. 7, when the respective poles 14 and 14 are removed from the meshing state with the ratchet 11, the ratchet 11 is switched to a state in which relative rotation with respect to the guide 12 is allowed.

Next, returning to FIG. 4, the outer ring 15 will be described. The outer peripheral ring 15 is formed in a cylindrical shape having a step by a half-punching process of a thin plate-like hollow disk member in the plate pressure direction (axial direction).
The outer peripheral ring 15 is formed as a sandwiching surface portion 15 b in which a part surface on the inner peripheral edge side contacts a part surface on the outer peripheral edge side of the outer plate surface of the ratchet 11. Then, as shown in FIG. 3, the part surface on the outer peripheral side of the outer peripheral ring 15 is formed as a clamping surface part 15 a that is caulked so as to contact the part surface on the outer peripheral side of the outer plate surface of the guide 12.
Therefore, the outer peripheral ring 15 is held in a state in which the ratchet 11 and the guide 12 are assembled and clamped so as to sandwich them so that they do not move apart in the plate pressure direction. Is done. The outer peripheral ring 15 is fixed with a clamping surface portion 15 a that is in contact with the guide 12 being integrally welded to the guide 12. Thereby, it is set as the structure which the ratchet 11 can rotate relatively with respect to the outer periphery ring 15 fixed integrally with the guide 12 and this guide 12. As shown in FIG.

As shown in FIG. 3, the operation shaft 17 is inserted into the through holes 11 h and 12 h formed in the central portions of the ratchet 11 and the guide 12 described above. The operation shaft 17 is integrally connected to the operation lever L described above with reference to FIG. 1, and the shaft is operated to rotate along with the operation of lifting the operation lever L. The operation shaft 17 is integrally connected to the rod R in the rotation direction.
An operation cam 18 having a cam-shaped outer peripheral surface is inserted into the operation shaft 17 and connected to each other in an integral state in the rotation direction. As shown in FIG. 4, the operation cam 18 is housed and disposed in a through hole 13 h formed through the push-pull member 13. Then, when the operation shaft 17 is turned, the operation cam 18 slides the push / pull member 13 from the inner peripheral surface side of the through hole 13h by the swelled pushing portion 18a of the cam-shaped outer peripheral surface. It is designed to operate.
Here, returning to FIG. 4, a rectangular tube-shaped spring hook 18 b is formed at the left end of the shaft portion of the operation cam 18 in the figure. An end portion on the center side of the torsion spring 16 is hooked on the spring hook portion 18b. The end portion on the outer peripheral side of the torsion spring 16 is hooked on a spring hooking portion 12k formed to protrude from the guide 12. Accordingly, the operation cam 18 is normally urged to rotate counterclockwise as shown in FIG. 6 by the engagement of the torsion spring 16, thereby causing the pawls 14 and 14 to move to the inner teeth of the ratchet 11. It is held as being engaged with 11g. Then, as shown in FIG. 7, the operation cam 18 is rotated in the clockwise direction in the figure against the above urging to remove the respective poles 14 and 14 from the meshed state with the ratchet 11. Operate as follows. Then, the operation cam 18 is returned to the position state shown in FIG. 6 again by releasing the rotation operation in the clockwise direction shown in the figure.

Then, the usage method of a present Example is demonstrated.
That is, as shown by the phantom line in FIG. 1, for example, when the operation lever L is pulled up in a posture state where the seat back 2 is tilted backward, the seat back 2 is in a fixed state of its backrest angle. Will be solved and will be raised by the energies.
At this time, if the seat back 2 is normal, as the center of gravity moves during the movement, the movement of the seat back 2 is bounced and the rotation speed is gradually increased. However, in the configuration of the present embodiment, as shown in FIG. 2, if the movement of the seat back 2 being lifted up is urged, the arm swing member 30 receives the action of the inertial force and the arm swing member 30 swings the arm. The sliding portion 21 of the pressing member 20 is pressed against the outer peripheral surface of the fixed side ring 40 to slide on the outer peripheral surface. As a result, a frictional resistance force due to sliding is applied to the movement of the seat back 2, and the movement of the seat back 2 being raised is decelerated so as not to give too much momentum.

As described above, according to the vehicle seat 1 of the present embodiment, the movement of the seat back 2 is slid by utilizing the action of the inertial force when the forward movement of the seat back 2 in the rotational direction is added. By adopting a configuration in which a resistance force due to dynamic friction is applied, it is possible to simply configure a mechanism for decelerating the seat back 2 so as not to give too much movement.
Furthermore, the pressing member 20 (movable body) is arranged by disposing the stationary side ring 40 that is a stationary body along the outer peripheral edge of the annular outer circumferential ring 15 (outer circumferential clamping member) that is a component of the reclining device 10. The sliding surface for sliding can be set rationally and compactly.
Further, as a configuration in which the pressing member 20 is pressed against the fixed side ring 40 using the arm swinging motion of the arm swinging member 30 having the weight 31 at the tip, the speed reduction mechanism can be realized with a relatively simple configuration.

Then, the structure of the vehicle seat 1 of Example 2 is demonstrated using FIG. In addition, in a present Example, about the location which has the structure and effect | action substantially the same as the vehicle seat 1 of Example 1, the same code | symbol is attached | subjected, description is abbreviate | omitted, and a different location is demonstrated in detail.
In the present embodiment, a bulging portion 41 that swells partially is formed on a part of the outer peripheral surface of the stationary ring 40 corresponding to the stationary body of the present invention. Thereby, the frictional resistance force when the sliding portion 21 of the pressing member 20 slides on the outer peripheral surface of the fixed side ring 40 can be locally increased at the portion where the bulging portion 41 is formed. It has become.
As shown in the figure, when the seat back 2 is in an upright posture where the movement of the seat back 2 tends to be elastic, the sliding portion 21 of the pressing member 20 slides on the outer peripheral surface thereof. It is arranged and formed to move. Thereby, the movement of the seat back 2 being raised can be effectively decelerated.

Although the embodiment of the present invention has been described with reference to two examples, the present invention can be implemented in various forms in addition to the above-described example.
For example, the reclining device may be provided so as to connect the seat back and the floor instead of connecting the seat back and the seat cushion. In this case, the fixed body is set as a component member integrated with the floor.
In addition, the movable body has a configuration in which a frictional resistance force caused by sliding is applied by an arm swinging motion (rotating motion) by the action of an inertial force that raises the seat back. However, the movable body is slid by another motion such as a linear motion. A frictional resistance force due to movement may be applied.
Moreover, although the structure by which the stationary side ring used as a fixing body was arrange | positioned along the outer periphery of the outer periphery ring (outer periphery clamping member) which comprises a reclining apparatus was illustrated, the structural member (floor side) of the other seat cushion side It is also possible to set a fixed body to the structural member.
Further, although the material of the movable body and the fixed body is not particularly described, it is sufficient that these are formed of a material having an appropriate friction coefficient, and the character is not particularly limited.

1 is a perspective view illustrating a schematic configuration of a vehicle seat according to Embodiment 1. FIG. It is the II-II sectional view taken on the line of FIG. It is the III-III sectional view taken on the line of FIG. It is a disassembled perspective view of a reclining apparatus. It is an assembly state figure of a reclining device. FIG. 6 is a sectional view taken along line VI-VI in FIG. 5. It is sectional drawing showing the state by which the lock | rock of the reclining apparatus was cancelled | released from the state of FIG. FIG. 6 is a configuration diagram illustrating a vehicle seat speed reduction mechanism according to a second embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat back 2f Back frame 2L L-shaped frame 2a Dowel hole 2b D Dowel hole 2c Through hole 3 Seat cushion 3f Cushion frame 3L L frame 3a Dowel hole 3b D Dowel hole 3c Through hole 3k Locking part 3j Stop 4 Headrest 10 Reclining device 11 Ratchet (first connecting member)
11g Internal teeth 11h Through hole 11a Dowel 11b D Dowel 12 Guide (second connecting member)
12n Inner peripheral surface 12g Guide portion 12h Through hole 12a Dowel 12b D Dowel 12d Groove portion 12k Spring hook portion 13 Push / pull member 13h Through hole 13p Push portion 13q Pull portion 13d Depressed portion 14 Pole 14g External teeth 14k Outer portion 14b Leg portion 15b Ring (peripheral clamping member)
15a Clamping surface portion 15b Clamping surface portion 15c Outer peripheral surface portion 16 Torsion spring 17 Operation shaft 18 Operation cam 18a Pushing portion 18b Spring hook portion 20 Pressing member 21 Sliding portion 22 Back surface portion 23 Connecting shaft 30 Arm swinging member 31 Weight 32 Cam portion 33 Connection Shaft 40 Fixed side ring (fixed body)
41 bulge L control lever Ss torsion spring R rod

Claims (2)

A vehicle seat configured such that a seat back can be adjusted and moved by a reclining device connected to the seat back.
An urging member for urging the seat back in the forward raising rotation direction;
A deceleration mechanism that decelerates the movement of the seat back that rotates in the forwardly rotating direction by the urging force of the urging member,
The speed reduction mechanism decelerates the movement of the seat back by applying a frictional resistance force by sliding a movable body provided to move integrally with the seat back to a fixed body such as a seat cushion. It is composed,
The movable body is pressed against the fixed body by the action of an inertial force when the urging force of the urging member urges the movement of the seat back in the turning direction to increase the frictional resistance force when sliding. The movable body is provided with a pressing member that applies a frictional resistance force by sliding by being pressed against the fixed body, and an arm swinging motion provided on the seat back so that the arm swinging motion is possible. An arm swinging member having a cam-shaped outer peripheral surface capable of pressing the pressing member against a fixed body, the arm swinging member having a weight at a tip of the arm swinging, and A vehicle seat characterized in that the arm swings under the action of an inertial force when the forward movement of the pivoting direction is bounced . The vehicle seat according to claim 1,
The reclining device is
A disk-shaped first coupling member coupled integrally with the seat back;
A disk-shaped second coupling member that is provided in the form of facing the first coupling member and the disk surface, and is coupled integrally with a stationary member such as the seat cushion;
An annular outer peripheral clamping member that is provided in a form surrounding the outer peripheral edges of the two connecting members, and that clamps them in the thickness direction in a state in which the relative rotation of the two connecting members is allowed;
The outer peripheral clamping member is integrally connected in a circumferential direction with a second connecting member that is integrally connected to a stationary member such as the seat cushion, and the fixed body is attached to the outer peripheral edge of the outer peripheral clamping member. A vehicle seat characterized in that the vehicle seat is configured as an annular member that is integrally assembled with the circumferential member along the circumferential direction.

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