JP2007153308A - Vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accomplish reduction of the number of parts of a vehicle seat by partially using in common a mechanism for rotating a seat body and a mechanism for restricting rotation of the seat body. <P>SOLUTION: The vehicle seat is a vehicle seat provided with the seat body; a seat rotation mechanism 30; a gear forming member 42 provided with a rotation gear 42e; a drive gear 45 engaged with the rotation gear 42e; and an actuator 44 for rotating/driving the drive gear 45. The vehicle seat has movement mechanisms 45, 42r, 47, 48 for relatively moving the drive gear 45 and the gear forming member 42 such that a position relationship in which the drive gear 45 is not engaged with the rotation gear 42e when the seat body is rotated to a first position and a position relationship in which the drive gear 45 is interfered with the gear forming member 42 when the seat body is rotated in a direction of a second position are accomplished. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle seat capable of rotating a seat body substantially horizontally between a first position and a second position.

Various types of vehicle seats have been proposed.
For example, as shown in FIG. 8, the vehicle seat disclosed in Patent Document 1 includes a seat rotation mechanism 91 that supports a seat body 94 on a vehicle floor so as to be rotatable between a vehicle forward position and a vehicle lateral position; And a drive mechanism 92 for rotating the sheet main body 94.
Further, the vehicle seat includes a rotation restricting mechanism 100 that can restrict the rotation and release the restriction while the seat body 94 is rotated to the vehicle forward position or the vehicle lateral position. The rotation restricting mechanism 100 is fixed to a lock plate 105a, 105b fixed at a predetermined position on the vehicle floor side, and fixed to the seat main body 94 side, and when the seat main body 94 rotates to a vehicle forward position or a vehicle lateral position. A lock member 104 that can be engaged with the lock plates 105a and 105b is provided. Further, on the seat body 94 side, an unlocking motor 107 and an operation wire 108 for transmitting the movement of the unlocking motor 107 to the locking member 104 and operating the locking member 104 in the unlocking direction are provided. .

JP 2001-97081 A

  The vehicle seat described above includes a rotation regulating mechanism 100 in addition to the seat rotation mechanism 91 and the drive mechanism 92. Further, the rotation restricting mechanism 100 includes lock plates 105a and 105b, a lock member 104, a lock release motor 107, an operation wire 108, and the like, and has a large number of parts. For this reason, it leads to the cost increase of the vehicle seat.

  The present invention has been made to solve the above-mentioned problems, and the problem to be solved by the present invention is that a mechanism for rotating the seat body and a mechanism for regulating the rotation of the seat body are partially provided. The purpose is to reduce the number of parts of the vehicle seat so that the vehicle seat can also be used.

The above-described problems are solved by the inventions of the claims.
According to a first aspect of the present invention, there is provided a seat main body, a seat rotating mechanism that supports the seat main body on the vehicle floor so as to be substantially horizontally rotatable between the first position and the second position, and an arc-shaped gear. A gear forming member including a rotation gear arranged so that an arc center thereof coincides with a rotation center of the seat body, a drive gear meshing with the rotation gear, and an actuator for rotationally driving the drive gear One of a rotating part on the seat body side and a fixed part on the vehicle floor side that rotate relatively when the seat body rotates, the other includes the gear forming member, and the other includes the driving gear, A vehicle seat in which the seat main body is rotated by relative rotation of the drive gear and the gear forming member in accordance with rotational driving, and the drive gear is rotated when the seat main body rotates to the first position. The drive so that the drive gear is in a positional relationship that interferes with the gear forming member when the seat main body is about to rotate in the direction of the second position at a position that does not mesh with the rotation gear. It has a moving mechanism which moves a gear and the gear formation member relatively in the direction of a rotation regulation position.

According to the present invention, when the seat body rotates to the first position, the gear forming member and the drive gear relatively move in the direction of the rotation restriction position by the action of the moving mechanism. That is, when the drive gear does not mesh with the rotation gear and the seat body tries to rotate in the direction of the second position, the drive gear is held in a positional relationship that interferes with the gear forming member. Thus, the rotation of the seat body is restricted by the interference between the drive gear and the gear forming member.
For this reason, a mechanism for rotating the seat body and a mechanism for restricting the rotation of the seat body can be partially used, and the number of parts of the vehicle seat can be reduced. As a result, the cost of the vehicle seat can be reduced.

According to a second aspect of the present invention, the moving mechanism includes the gear forming member between a sheet rotation position where the arc center of the rotation gear coincides with the rotation center and a rotation restriction position that interferes with the drive gear. A gear rotation mechanism that supports the rotation of the gear forming member, and an arcuate gear formed continuously with the rotation gear on the gear forming member, the center of the arc coincides with the rotation center of the gear forming member. And a rotation restricting gear that meshes with the drive gear when the seat body rotates to the first position, and is driven to rotate in a state where the drive gear is engaged with the rotation restricting gear. The rotation restricting gear is configured to rotate between the seat rotation position and the rotation restricting position.
For this reason, a drive gear can be used as a drive source of a moving mechanism.

According to the invention of claim 3, when the seat main body tries to rotate toward the second position in a state where the gear forming member is in the rotation restricting position in the rotation part and the fixed part including the drive gear, An engagement portion that engages with the forming member and restricts the rotation of the sheet main body is provided.
For this reason, even if a rotational impact in the direction of the second position is applied to the gear forming member or the like with the seat body in the first position, the gear forming member and the engaging portion are engaged. This makes it difficult to apply the impact to the drive gear.

According to invention of Claim 4, it has a movable member attached to the direction containing a gear formation member among a rotation part and a fixed part, and a fixing member attached to the direction containing a drive gear, The said sheet | seat When the main body rotates to the first position and the gear forming member moves in the direction of the rotation restriction position with respect to the drive gear by the operation of the moving mechanism, the movable member moves together with the gear forming member, In the rotation direction of the seat main body, the positional relationship is engageable with the fixing member.
According to the present invention, when the gear forming member moves in the direction of the rotation restriction position with respect to the drive gear by the operation of the moving mechanism, the movable member moves together with the gear forming member and has a positional relationship that can be engaged with the fixed member. Become. Thereby, for example, even when a rotational force is applied to the seat body in the event of a vehicle collision, the rotation of the rotating portion and the seat body with respect to the stationary portion is locked by the movable member engaging with the stationary member. The

According to a fifth aspect of the present invention, the movable member receives an elastic force in a direction that allows the movable member to engage with the fixed member, and is coupled to the gear forming member, and the gear forming member is in a rotation restricting position direction. When moving to the position, the gear forming member moves in the direction of the elastic force to move the movable member to a position engageable with the fixed member, and a position engageable with the fixed member. When the gear forming member continues to move in the direction of the rotation restricting position with respect to the movable member held at that position, the gear forming member is separated from the movable member to be in a non-contact state. It is characterized by.
Thus, in a state where the gear forming member is in the rotation restricting position, the gear forming member is held in a non-contact state with respect to the movable member in a positional relationship that can be engaged with the fixed member. For this reason, for example, even when a collision load is applied to the gear forming member via the seat body at the time of a vehicle collision, the movement of the gear forming member is not transmitted to the movable member. For this reason, the malfunction that a movable member remove | deviates from a fixed member by the movement of the said gear formation member in the collision of a vehicle, etc. does not arise.

According to the invention of claim 6, the movable member is attached to the rotating portion, and the fixed member is attached to the fixed portion, and the fixed portion is arranged so as not to hinder the movement of the movable member. A bracket that covers the movable member from above and supports the fixing member is fixed.
For this reason, for example, even when receiving a force in the direction in which the rotating part jumps up with respect to the fixed part at the time of a vehicle collision or the like, the movable member on the rotating part side is pressed by the bracket on the fixed part side. In addition, the sheet body can be prevented from jumping up.

  According to the present invention, since the mechanism for rotating the seat body and the mechanism for restricting the rotation of the seat body can be partially used, the number of parts of the vehicle seat can be reduced, and the cost of the vehicle seat can be reduced. Can be planned.

[Embodiment 1]
Hereinafter, based on FIGS. 1-4, the vehicle seat which concerns on Embodiment 1 of this invention is demonstrated. Here, FIG. 1 is a plan view showing a seat rotation mechanism and the like of a vehicle seat according to the present embodiment, FIG. 2A is a vertical sectional view taken along the line IIA-IIA in FIG. 1, and FIG. IIB-IIB arrow sectional view of FIG. 3, FIG. 3 is an III arrow enlarged view of FIG. FIG. 4 is an overall schematic plan view of the vehicle seat.
In addition, front and rear, right and left and up and down in the figure correspond to front and rear, right and left and up and down in the vehicle.

<Overview of vehicle seats>
As shown in FIG. 4, the vehicle seat 1 according to the present embodiment includes a seat body 10 and a front-rear moving mechanism 20 for moving the seat body 10 in a predetermined range in the front-rear direction on the vehicle floor (FIG. 2). And a seat rotation mechanism 30 that supports the seat body 10 so as to be horizontally rotatable between a vehicle forward position and a vehicle lateral position (rightward position).
The front-rear moving mechanism 20 includes a pair of left and right fixed rails (not shown) fixed on the vehicle floor, and a slide table 22 (see FIG. 2) that can slide back and forth along the fixed rails. Further, on the vehicle floor, a slide motor (not shown) that is a drive source of the back-and-forth movement mechanism 20 is attached.
The sheet rotation mechanism 30 is installed on the slide table 22 of the back-and-forth movement mechanism 20.
The seat rotation mechanism 30 has an inner ring 32 and an outer ring 33 that can rotate relative to each other. Between the V groove formed in the outer circumferential direction of the inner ring 32 and the V groove formed in the inner circumferential direction of the outer ring 33. A number of steel balls 34 (see FIGS. 2A and 2B) are sandwiched. As a result, the outer ring 33 can be rotated smoothly and without rattling with respect to the inner ring 32.
The seat rotation mechanism 30 has an inner ring 32 fixed to the slide table 22, and a rotation table 35 is installed on the outer ring 33. The sheet body 10 is installed on the rotary table 35.
That is, the vehicle floor that does not rotate when the seat body 10 rotates, the fixed rail of the back-and-forth movement mechanism 20, the slide table 22 and the like correspond to the fixed portion on the vehicle floor side of the present invention, and the outer ring 33 that rotates integrally with the seat body 10 and The rotary table 35 and the like correspond to the rotary part on the sheet body side of the present invention.

<About the gear forming member 42, the drive gear 45, etc.>
Next, the gear forming member 42 and the drive gear 45 for rotating the outer ring 33 with respect to the inner ring 32 of the seat rotation mechanism 30 will be described.
As shown in FIGS. 2A and 2B, the gear forming member 42 is a plate-like member connected to the rotary table 35 in a state where the gear forming member 42 is overlaid on the lower surface of the rotary table 35. As shown in FIGS. 1 and 4, the gear forming member 42 is formed in a substantially arc shape having a predetermined width in the radial direction, and is disposed along the outer periphery of the outer ring 33. An arcuate inner peripheral surface located on the center side of the arc in the direction and an outer peripheral surface located on the opposite side, and a side end surface that is located at both ends in the circumferential direction and is linear in a plan view in parallel with the radial direction. It has. The gear forming member 42 is provided with a fixing pin 47 near the outer periphery in the vicinity of the side end face 42b that becomes the rear end face when the seat body 10 is in the vehicle frontward position (see FIGS. 1 and 4), and the side that becomes the front end face A movable pin 48 is provided near the outer periphery near the end face 42f. Then, as shown in FIG. 2B, the fixing pin 47 is inserted into the through hole 35h of the rotary table 35 and is prevented from coming off, so that the gear forming member 42 rotates relative to the rotary table 35. Connected in a movable state. Further, as shown in FIG. 2A, the movable pin 48 of the gear forming member 42 is inserted into the arc-shaped elongated hole 35m of the rotary table 35 so as to be prevented from coming off, and the arc-shaped elongated hole 35m The center of the arc coincides with the center of the fixing pin 47. For this reason, the gear forming member 42 can rotate with respect to the rotary table 35 by the length of the arc-shaped long hole 35m around the fixed pin 47.

An arcuate rotating gear 42e is formed on the outer peripheral surface of the gear forming member 42 from one side end face 42b of the gear forming member 42 to the vicinity of the other side end face 42f. That is, an arcuate rotation gear 42e is formed from the position that becomes the rear end face to the vicinity of the position that becomes the front end face when the seat body 10 is in the vehicle forward position (see FIGS. 1 and 4). Further, on the outer peripheral surface of the gear forming member 42, an arc-shaped rotation restricting gear 42r is formed up to the other side end face 42f (front end face) of the gear forming member 42 in succession to the rotating gear 42e. .
As shown in FIG. 3, at the boundary between the rotation gear 42e and the rotation regulating gear 42r, the drive gear 45 (described later) can move between the gears 42e and 42r smoothly as shown in FIG. The bottom B is in contact.
Further, as shown in FIG. 1, a positioning surface 42 s is formed on the inner peripheral surface of the gear forming member 42 in the vicinity of the other side end surface 42 f (front end surface), and the positioning surface 42 s is the sheet rotation mechanism 30. It is comprised so that contact | abutting with the outer peripheral surface of this outer ring | wheel 33 is possible. Then, with the positioning surface 42 s of the gear forming member 42 in contact with the outer peripheral surface of the outer ring 33, the arc center of the arcuate rotation gear 42 e coincides with the rotation center of the outer ring 33 (rotation center of the seat body 10). To come.
Further, the arc-shaped rotation restricting gear 42r continuous to the rotating gear 42e is configured such that the center of the arc coincides with the center of the fixed pin 47.
The gear forming member 42 is formed with openings 42z for weight reduction at the front portion and the rear portion.

  As shown in FIGS. 1 and 2, the slide table 22 to which the inner ring 32 of the seat rotation mechanism 30 is fixed has a drive gear 45 that meshes with the rotation gear 42e of the gear forming member 42 or the rotation restriction gear 42r, A rotation motor 44 that rotates the drive gear 45 is installed. The distance from the rotation center of the outer ring 33 to the rotation center of the drive gear 45 is such that the drive gear 45 is in contact with the rotation gear 42e while the positioning surface 42s of the gear forming member 42 is in contact with the outer ring 33 of the seat rotation mechanism 30. The distance that can be engaged is set. That is, in the state where the drive gear 45 is engaged with the rotation gear 42e, the arc center of the rotation gear 42e coincides with the rotation center of the outer ring 33 (the rotation center of the seat body 10). Therefore, when the drive gear 45 rotates counterclockwise in FIG. 1 in the above-described meshing state, the gear forming member 42 and the outer ring 33 of the seat rotation mechanism 30 rotate right about the inner ring 32 by the rotational force of the drive gear 45, and the seat The main body 10 rotates right together with the rotary table 35. Further, when the drive gear 45 is rotated to the right while meshing with the rotation gear 42e, the gear forming member 42 and the outer ring 33 of the seat rotation mechanism 30 are rotated to the left about the inner ring 32 by the rotational force of the drive gear 45, The sheet body 10 rotates counterclockwise together with the rotary table 35.

Then, when the drive gear 45 rotates to the right, the gear forming member 42 and the seat body 10 rotate to the left, and the drive gear 45 moves to the boundary position between the rotation gear 42e and the rotation restricting gear 42r of the gear forming member 42. In this state (see FIG. 1), the seat body 10 is returned to the vehicle forward position (left rotation limit position).
As shown in FIG. 1, on the slide table 22, a stopper member 50 with which one side end face 42 b of the gear forming member 42 abuts in a state in which the seat body 10 is rotated counterclockwise to a vehicle forward position (left rotation limit position). Is installed. The stopper member 50 includes a first stopper 51 and a second stopper 52 that can come into contact with one side end surface 42b of the gear forming member 42. The drive gear 45 includes a rotation gear 42e and a rotation restriction gear 42r. The first stopper 51 comes into contact with one side end face 42b of the gear forming member 42 in a state where the first stopper 51 is in the boundary position.

When the drive gear 45 further rotates to the right from the state where the drive gear 45 is at the boundary between the rotation gear 42e and the rotation restriction gear 42r, the drive gear 45 meshes with the rotation restriction gear 42r. As described above, the arc center of the rotation restricting gear 42r coincides with the center of the fixed pin 47, and one side end face 42b of the gear forming member 42 is in contact with the first stopper 51 (see FIG. 1). ). For this reason, when the drive gear 45 meshed with the rotation restricting gear 42r rotates to the right, the gear forming member 42 rotates to the left about the fixed pin 47 without rotating about the inner ring 32 (see FIG. 1, see the two-dot chain line in FIG. 3). As a result, the positioning surface 42s of the gear forming member 42 is separated from the outer ring 33 of the seat rotation mechanism 30, and the arc center of the rotation gear 42e of the gear forming member 42 is deviated from the rotation center of the outer ring 33 (the rotation center of the seat body 10). It becomes like this. When the drive gear 45 moves to the gear end of the rotation regulating gear 42r, the gear forming member 42 moves to the left rotation limit position around the fixed pin 47, and one side end face 42b of the gear forming member 42 is the first end face 42b. 2 comes into contact with the stopper 52. In this state, when the sheet main body 10 receives an external force and tries to rotate in the right rotation direction, the drive gear 45 is in a positional relationship that interferes with the gear forming member 42, so that the rotation of the sheet main body 10 is restricted.
Further, the slide table 22 has the gear forming member 42 in the left rotation limit position with the fixed pin 47 as the center, and the lower end of the movable pin 48 of the gear forming member 42 as shown in FIG. An engaging portion 22k that engages the portion 48d with the seat body 10 in the clockwise direction is provided.
When the gear forming member 42 is not in the left rotation limit position around the fixed pin 47, the engagement between the lower end portion 48d of the movable pin 48 and the engaging portion 22k of the slide table 22 is released.

That is, the position of the gear forming member 42 when the center of the arc of the rotating gear 42e coincides with the center of rotation of the outer ring 33 (the center of rotation of the seat body 10) is referred to as the seat rotation position, and the gear is formed around the fixed pin 47. The left rotation limit position of the member 42 corresponds to the rotation restriction position of the present invention. Further, the fixed pin 47, the movable pin 48, the arc-shaped elongated hole 35m of the rotary table 35, the positioning surface 42s of the gear forming member 42, the second stopper 52, and the like correspond to the gear rotation mechanism of the present invention. The rotation regulating gear 42r and the drive gear 45 correspond to the moving mechanism of the present invention.
The rotation motor 44 that rotates the drive gear 45 corresponds to the actuator of the present invention.

<Operation of vehicle seat>
Next, operation | movement of the vehicle seat 1 which concerns on this embodiment is demonstrated.
In the passenger compartment, the seat body 10 is in the forward-facing position of the vehicle, and the drive gear 45 is positioned at the gear end of the rotation restricting gear 42r. That is, when the gear forming member 42 is located at the rotation restricting position and the sheet main body 10 receives an external force and tries to rotate rightward, the gear forming member 42 and the drive gear 45 interfere with each other. Become. Further, the lower end portion 48d of the movable pin 48 of the gear forming member 42 is engaged with the engagement portion 22k of the slide table 22 in the clockwise rotation direction of the seat body 10 and the like. That is, the right rotation of the seat body 10 is restricted by the drive gear 45, the gear forming member 42, the lower end portion 48d of the movable pin 48, and the engaging portion 22k.
Further, since one side end face 42b of the gear forming member 42 is in contact with the first stopper 51 and the second stopper 52 of the stopper member 50, the left rotation of the sheet body 10 is restricted by the stopper member 50. ing.

In this state, when the door on the right side of the passenger compartment is opened and the getting-off switch (not shown) is turned on, the seat body 10 slides back and forth to the rotational position by the action of the longitudinal movement mechanism 20, and the drive gear 45 is moved at this rotational position. In FIG. 1, it rotates counterclockwise. As a result, the drive gear 45 and the rotation restricting gear 42r of the gear forming member 42 mesh with each other, and the gear forming member 42 rotates rightward in FIG. 1 and FIG. While the drive gear 45 and the rotation restricting gear 42r are engaged with each other, the seat main body 10 is held in the vehicle frontward position. As shown in FIG. 1 and the like, when the drive gear 45 moves to the boundary position between the rotation regulating gear 42r and the rotation gear 42e of the gear forming member 42, the positioning surface 42s of the gear forming member 42 becomes the sheet rotation mechanism 30. The outer ring 33 comes into contact with the outer peripheral surface. In this state, the arc center of the rotation gear 42e of the gear forming member 42 coincides with the rotation center of the sheet body 10, and the gear forming member 42 is held at the sheet rotation position. That is, the restriction on rotation of the seat body 10 in the right direction is released.
Then, when the drive gear 45 continues to rotate counterclockwise, the drive gear 45 meshes with the rotation gear 42e, and the gear forming member 42 and the outer ring 33 of the seat rotation mechanism 30 are centered on the inner ring 32 by the rotational force of the drive gear 45. Turn right. Then, the sheet body 10 rotates right together with the rotary table 35. In this way, with the drive gear 45 moving to the rear end of the rotation gear 42e, the seat body 10 rotates to a rightward position facing the door opening side.

Next, when a boarding switch (not shown) is turned on while the seat body 10 is in the rightward position, the drive gear 45 rotates to the right. Accordingly, contrary to the above, the gear forming member 42 and the outer ring 33 of the seat rotation mechanism 30 rotate to the left about the inner ring 32, and the seat body 10 rotates to the left together with the rotary table 35. When the drive gear 45 moves to the boundary position between the rotation regulating gear 42r and the rotation gear 42e of the gear forming member 42, the seat body 10 and the like are returned to the vehicle frontward position. In this state, as shown in FIG. 1, one side end surface 42 b of the gear forming member 42 abuts on the first stopper 51 of the stopper member 50, and the left rotation of the sheet body 10 and the like is restricted.
When the drive gear 45 continues to rotate to the right, the drive gear 45 meshes with the rotation regulating gear 42r of the gear forming member 42, and the gear forming member 42 rotates to the left in FIGS. . As a result, the positioning surface 42s of the gear forming member 42 is separated from the outer ring 33 of the seat rotation mechanism 30, and the arc center of the rotation gear 42e of the gear forming member 42 is deviated from the rotation center of the outer ring 33 (the rotation center of the seat body 10). It becomes like this. When the drive gear 45 moves to the gear end of the rotation restricting gear 42r, the gear forming member 42 moves to the rotation restricting position so that one side end face 42b of the gear forming member 42 contacts the second stopper 52. become. Thus, since the gear forming member 42 is in the rotation restricting position, the drive gear 45 interferes with the gear forming member 42 when the seat main body 10 receives an external force and attempts to rotate in the right rotation direction. Further, the lower end portion 48 d of the movable pin 48 of the gear forming member 42 is engaged with the engaging portion 22 k of the slide table 22 in the clockwise rotation direction of the seat body 10.
That is, the right rotation of the seat body 10 is restricted by the drive gear 45, the gear forming member 42, the lower end portion 48d of the movable pin 48, and the engaging portion 22k. Further, the gear forming member 42 and the stopper member 50 restrict leftward rotation of the sheet main body 10.

<Advantages of the vehicle seat according to this embodiment>
According to the vehicle seat according to the present embodiment, when the seat body 10 rotates to the vehicle forward position, the seat gear 10 tries to rotate rightward at a position where the drive gear 45 does not mesh with the rotation gear 42e. Sometimes, the drive gear 45 is held in a positional relationship that interferes with the gear forming member 42. That is, the rotation of the sheet body 10 is restricted by the interference between the drive gear 45 and the gear forming member 42.
For this reason, a mechanism for rotating the seat body 10 and a mechanism for restricting the rotation of the seat body 10 can be partially used, and the number of parts of the vehicle seat can be reduced. As a result, the cost of the vehicle seat can be reduced.
Further, even when a rotational impact in the right direction is applied to the gear forming member 42 or the like in a state where the seat body 10 is in the vehicle forward position, the movable pin 48 of the gear forming member 42 and the engaging portion 22k of the slide table 22 are applied. And the drive gear 45 is less likely to be impacted.

[Embodiment 2]
Hereinafter, based on FIGS. 5-7, the vehicle seat which concerns on Embodiment 2 of this invention is demonstrated. The vehicle seat according to the present embodiment is obtained by adding a rotation lock mechanism 60 to the seat rotation mechanism 30 of the vehicle seat according to the first embodiment. Other configurations are the same as those of the vehicle seat according to the first embodiment. It is.
Here, FIG. 5 and FIG. 6 are plan views showing the rotation lock mechanism and the like of the vehicle seat according to the present embodiment, and FIG. 7 is a vertical sectional view taken along arrow VII-VII in FIG.

<About rotation lock mechanism 60>
As shown in FIG. 7 and the like, the rotation lock mechanism 60 is erected on the slide table 22 and the movable member 62 attached to the lower side of the rotary table 35 so as to be horizontally rotatable by the support pins 61. And a fixed member 65 configured to be engageable with the movable member 62. 5 and 6, the rotary table 35 and the slide table 22 are omitted.
As shown in FIGS. 5A and 6, the movable member 62 is a plate-like member that is curved in a substantially plane shape and is disposed so as to extend in the left-right direction of the seat body 10. The movable member 62 has a narrow width portion 62n formed narrow from the base end portion (right end portion) to the center, and an expansion formed so as to gradually become wider from the center to the vicinity of the tip end (left end). It is comprised from the opening part 62w. The substantially central position of the movable member 62 is attached to the rotary table 35 so as to be rotatable by the support pins 61 described above. As shown in FIG. 7, the support pin 61 is formed longer than the fixed pin 47 and the movable pin 48 for attaching the gear forming member 42 to the rotary table 35, and is formed at the tip portion (lower end portion) of the support pin 61. The movable member 62 is connected. Accordingly, the movable member 62 is disposed below the gear forming member 42.

As shown in FIG. 5A, a pin opening 63 through which the movable pin 48 of the gear forming member 42 is passed from above is formed in the expanded portion 62w of the movable member 62, as shown in FIG. . The pin opening 63 is a part that transmits the horizontal movement of the movable pin 48 to the movable member 62 when the gear forming member 42 moves between the seat rotation position and the rotation restriction position around the fixed pin 48.
As shown in FIG. 5 (B), the pin opening 63 is a non-circular opening partially including a first straight portion 63a and a second straight portion 63b corresponding to two adjacent sides of a triangle. When the gear forming member 42 moves about the fixed pin 48 in the sheet rotation position direction (the direction of the imaginary line in FIG. 5A), the movable pin 48 moves the first straight portion 63 a of the pin opening 63. When pressed, the movable member 62 rotates counterclockwise around the support pin 61 by the pressing force of the movable pin 48. Further, when the gear forming member 42 moves around the fixed pin 48 in the rotation restricting position direction (the direction of the solid line in FIG. 5A), the movable pin 48 presses the second linear portion 63b of the pin opening 63. Then, the movable member 62 can be rotated clockwise around the support pin 61 by the pressing force of the movable pin 48.

The narrow width portion 62n of the movable member 62 is formed with a spring receiver 64 at the position of the base end portion (right end portion), and the spring 66 urged by the spring receiver 64 in the direction to rotate the movable member 62 clockwise. Are connected at one end. The other end of the spring 66 is connected to a spring receiver (not shown) provided on the rotary table 35. The rotary table 35 is provided with a rotation stopper 67 at a specified position for holding the movable member 62 that receives the rotational force of the spring 66 at the right rotation limit position.
In addition, a substantially concave elliptical hook portion 68 that is notched so as to open on the front side (the right side in FIG. 5) is formed at the distal end portion of the expanded portion 62w of the movable member 62.

Then, as shown in FIG. 5A, when the movable member 62 of the rotation lock mechanism 60 rotates horizontally to the right rotation limit position, the hook portion 68 of the movable member 62 rotates in the rotation direction of the seat body 10. 60 fixing members 65 can be engaged.
As shown in FIG. 7, the fixing member 65 is a substantially cylindrical pin-like member that stands upright with respect to the slide table 22, and the base end portion (lower end portion) of the fixing member 65 is fixed to the slide table 22. ing. Further, the distal end portion (upper end portion) of the fixing member 65 is supported by a plate-shaped bracket 69. As shown in FIG. 7, the bracket 69 includes a flat plate portion 69f parallel to the upper surface of the slide table 22, a stepped vertical plate portion 69e, and a fixed plate portion 69s fixed to the upper surface of the slide table 22. ing. The bracket 69 is configured such that the flat plate portion 69 f is disposed at a position higher than the movable member 62 of the rotation lock mechanism 60 in a state where the fixed plate portion 69 s is fixed to the upper surface of the slide table 22. And the front-end | tip part (upper end part) of the fixing member 65 is supported by the flat plate part 69f of the bracket 69. FIG. As a result, the movable member 62 of the rotation lock mechanism 60 rotates between the flat plate portion 69f of the bracket 69 and the upper surface of the slide table 22 to the right rotation limit position where it can engage with the fixing member 65.

<Operation of vehicle seat>
Next, operation | movement of the vehicle seat 1 which concerns on this embodiment is demonstrated.
When the disengagement switch (not shown) is turned on while the seat main body 10 is in the vehicle forward position and the seat main body 10 slides back and forth to the rotational position, the drive gear 45 rotates counterclockwise in FIG. As a result, the drive gear 45 and the rotation restricting gear 42r of the gear forming member 42 mesh with each other, and the gear forming member 42 rotates clockwise in FIG. 5 around the fixed pin 47 (see FIG. 1) by the rotational force of the drive gear 45. (Move in the direction of the two-dot chain line). The movable pin 48 of the gear forming member 42 moves the movable member 62 of the rotation lock mechanism 60 in the direction of the outer ring 33 of the seat rotation mechanism 30 (the direction of the two-dot chain line) at the position of the first linear portion 63a of the pin opening 63. Press. Thereby, the movable member 62 of the rotation lock mechanism 60 rotates counterclockwise around the support pin 61 against the elastic force of the spring 66.
When the drive gear 45 moves to the boundary position between the rotation restricting gear 42r and the rotation gear 42e of the gear forming member 42, the positioning surface 42s of the gear forming member 42 of the sheet rotating mechanism 30 is moved as shown in FIG. It contacts the outer peripheral surface of the outer ring 33. In this state, the arc center of the rotation gear 42e of the gear forming member 42 coincides with the rotation center of the sheet body 10, and the gear forming member 42 is held at the sheet rotation position. Further, the hook portion 68 of the movable member 62 of the rotation lock mechanism 60 and the fixed member 65 are in a positional relationship in which they cannot be engaged in the rotation direction of the sheet main body 10.
That is, the rotation restriction of the sheet body 10 is released.

Then, when the drive gear 45 continues to rotate counterclockwise, the drive gear 45 meshes with the rotation gear 42e, and the gear forming member 42 and the outer ring 33 of the seat rotation mechanism 30 are centered on the inner ring 32 by the rotational force of the drive gear 45. Turn right. Then, the sheet body 10 rotates right together with the rotary table 35.
Next, when the boarding switch (not shown) is turned on while the seat body 10 is in the rightward position, the drive gear 45 rotates to the right. As a result, contrary to the above, the sheet main body 10 rotates left together with the rotary table 35. When the drive gear 45 moves to the boundary position between the rotation regulating gear 42r and the rotation gear 42e of the gear forming member 42, the seat body 10 and the like are returned to the vehicle frontward position. Accordingly, one side end face 42b (see FIG. 1) of the gear forming member 42 contacts the first stopper 51 of the stopper member 50, and the left rotation of the sheet main body 10 and the like is restricted.

When the drive gear 45 continues to rotate clockwise from this state, the drive gear 45 meshes with the rotation regulating gear 42r of the gear forming member 42, and the gear forming member 42 rotates counterclockwise around the fixed pin 47 (see FIG. 1). (In FIG. 5, it moves from the two-dot chain line position to the solid line position). Then, the movable pin 48 of the gear forming member 42 moves in a direction away from the outer ring 33 of the seat rotation mechanism 30. As a result, the movable member 62 of the rotation lock mechanism 60 is rotated clockwise around the support pin 61 by the elastic force of the spring 66 so that the movable pin 62 follows the movable pin 48. At this time, the first straight portion 63 a of the pin opening 63 of the movable member 62 is held in a state of being in contact with the movable pin 48 of the gear forming member 42 by the action of the spring 66. Even if the spring 66 is damaged, the movable pin 48 of the gear forming member 42 presses the second straight portion 63b of the pin opening 63, so that the movable member 62 can rotate right about the support pin 61. become.
Here, the expansion part 62w of the movable member 62 that rotates clockwise around the support pin 61 moves between the upper surface of the slide table 22 and the flat plate part 69f of the bracket 69 (see FIG. 7).

Then, the movable member 62 of the rotation lock mechanism 60 comes into contact with the rotation stopper 67 before the gear forming member 42 reaches the rotation restriction position (see the solid line position in FIG. 5), and the movable member 62 is held at the right rotation limit position. Is done. As a result, the movable member 62 (hook 68) of the rotation lock mechanism 60 and the fixed member 65 are in a positional relationship that can be engaged in the rotation direction of the seat body 10.
When the drive gear 45 continues to rotate from this state and the gear forming member 42 rotates counterclockwise around the fixed pin 47 (see FIG. 1), the movable pin 48 of the gear forming member 42 is moved to the pin opening 63 of the movable member 62. It leaves | separates from the 1st linear part 63a. When the drive gear 45 moves to the gear end of the rotation restricting gear 42r, the gear forming member 42 is held at the rotation restricting position (see the solid line position in FIG. 5). In this state, a gap S is formed between the movable pin 48 of the gear forming member 42 and the first straight portion 63a of the pin opening 63 of the movable member 62, as shown in FIG. A gap S is also formed between the movable pin 48 and the second linear portion 63b of the pin opening 63, and the gear forming member 42 and the movable member 62 of the rotation lock mechanism 60 are held in a non-contact state. .
As described above, since the gear forming member 42 is in the rotation restricting position, when the seat main body 10 receives an external force and tries to rotate rightward, the drive gear 45 interferes with the gear forming member 42 to rotate the seat main body 10. Is regulated. Further, the movable member 62 (hook 68) of the rotation lock mechanism 60 and the fixed member 65 are engaged, and the rotation lock is activated.

<Advantages of the vehicle seat according to this embodiment>
According to the vehicle seat according to the present embodiment, when the gear forming member 42 moves in the direction of the rotation restriction position, the movable member 62 of the rotation lock mechanism 60 installed on the rotary table 35 moves together with the gear forming member 42. The positional relationship is such that the fixing member 65 installed on the slide table 22 and the seat body 10 can be engaged in the rotation direction. Thus, for example, even when a rotational force is applied to the seat body 10 in the event of a vehicle collision, the movable member 62 of the rotation lock mechanism 60 is engaged with the fixed member 65, thereby rotating the slide table 22. The rotation of the table 35, that is, the rotation of the sheet body 10 is securely locked.
Further, in a state where the gear forming member 42 is in the rotation restricting position, the movable pin 48 of the gear forming member 42 is held in a non-contact state with respect to the movable member 62 that is in a positional relationship engageable with the fixed member 65. The For this reason, for example, even when a collision load is applied to the gear forming member 42 via the seat body 10 at the time of a vehicle collision, the movement of the gear forming member 42 is not transmitted to the movable member 62. For this reason, there is no problem that the hook portion 68 of the movable member 62 is detached from the fixed member 65 due to the movement of the gear forming member 42 when the vehicle collides.
A movable member 62 is attached to the rotary table 35, and a fixed member 65 is attached to the slide table 22. The movable member 62 is attached to the slide table 22 so as not to hinder the movement of the movable member 62. A bracket 69 covering from above is fixed. For this reason, for example, even when a force in the direction in which the rotary table 35 jumps up against the slide table 22 in the event of a vehicle collision, the movable member 62 on the rotary table 35 side is pressed against the bracket 69 on the slide table 22 side. As a result, the turntable 35 and the sheet body 10 can be prevented from jumping up.

<Vehicle seat change example>
In addition, this invention is not limited to the said embodiment, The change in the range which does not deviate from the summary of this invention is possible. For example, in the present embodiment, the example in which the present invention is applied to the vehicle seat that rotates the seat body 10 between the vehicle forward position and the vehicle right position is shown, but the rotation range of the seat body 10 can be changed as appropriate. It is.
In the first embodiment, the drive gear 45 is provided on the slide table 22 side and the gear forming member 42 is provided on the rotary table 35 side. However, the drive gear 45 is provided on the rotary table 35 side and the gear forming member 42 is provided. Can also be provided on the slide table 22 side.
In the second embodiment, the driving gear 45 and the fixing member 65 of the rotation lock mechanism 60 are provided on the slide table 22 side, and the gear forming member 42 and the movable member 62 of the rotation lock mechanism 60 are provided on the rotation table 35 side. However, it is also possible to provide the fixed member 65 and the like of the rotation lock mechanism 60 on the rotary table 35 side and the movable member 62 and the like of the rotation lock mechanism 60 on the slide table 22 side.
In addition, the drive gear 45 and the rotation restricting gear 42r are engaged with each other, and the gear forming member 42 is rotated between the seat rotation position and the rotation restricting position. For example, the gear forming member 42 is seated with a cylinder or the like. It is also possible to move between the rotation position and the rotation restriction position.

It is a top view showing the seat rotation mechanism etc. of the vehicle seat concerning Embodiment 1 of the present invention. It is the IIA-IIA arrow longitudinal cross-sectional view (B figure) of FIG. 1, and the IIB-IIB arrow longitudinal cross-sectional view of FIG. FIG. 3 is an enlarged view taken along arrow III in FIG. 1. 1 is an overall schematic plan view of a vehicle seat. It is a top view showing the rotation locking mechanism etc. of the vehicle seat which concern on Embodiment 2 of this invention. It is a top view showing the rotation locking mechanism etc. of the vehicle seat which concern on Embodiment 2 of this invention. It is a VII-VII arrow longitudinal cross-sectional view of FIG. It is a whole schematic plan view of the conventional vehicle seat.

Explanation of symbols

10 Seat body 22 Slide table (vehicle floor fixed part)
22k engagement portion 30 sheet rotation mechanism 35 rotation table (rotation portion on the sheet body side)
42 Gear forming member 42e Rotating gear 42r Rotation restricting gear (moving mechanism)
44 Rotary motor (actuator)
45 Drive gear (movement mechanism)
47 Fixed pin (gear rotating mechanism, moving mechanism)
48 Movable pin (gear rotating mechanism, moving mechanism, part of gear forming member)
60 Rotation Lock Mechanism 62 Movable Member 63 Pin Opening 65 Fixed Member 66 Spring 69 Bracket

Claims (6)

A seat main body, a seat rotating mechanism that supports the seat main body on the vehicle floor so as to be rotatable substantially horizontally between the first position and the second position, and an arc-shaped gear, the arc center of which is The sheet main body rotation includes a gear forming member including a rotation gear arranged so as to coincide with the rotation center of the sheet main body, a drive gear meshing with the rotation gear, and an actuator that rotationally drives the drive gear. One of the rotating part on the seat main body side and the fixed part on the vehicle floor side that relatively rotate sometimes includes the gear forming member, and the other includes the driving gear, and the driving gear accompanying the rotational driving of the driving gear. And a vehicle seat in which the seat body rotates by relative rotation of the gear forming member,
When the seat body rotates to the first position, the drive gear does not mesh with the rotation gear, and the seat body tries to rotate in the direction of the second position. A vehicle seat, comprising: a moving mechanism that relatively moves the drive gear and the gear forming member in a rotation restricting position direction so that the drive gear has a positional relationship that interferes with the gear forming member. The vehicle seat according to claim 1,
The moving mechanism is
A gear rotation mechanism that rotatably supports the gear forming member between a sheet rotation position where the arc center of the rotation gear coincides with the rotation center and a rotation restriction position that interferes with the drive gear;
An arcuate gear formed continuously with the rotation gear on the gear forming member, the arc center of which coincides with the rotation center of the gear forming member, and the seat body is in the first position. A rotation regulating gear that meshes with the drive gear when rotated to
The rotation restriction gear is configured to rotate between the seat rotation position and the rotation restriction position when the drive gear is rotated and engaged with the rotation restriction gear. A vehicle seat. The vehicle seat according to claim 2,
When the seat main body tries to rotate toward the second position while the gear forming member is in the rotation restricting position, the gear forming member is included in the rotation part and the fixed part including the drive gear. A vehicle seat characterized in that an engagement portion is provided that engages with and restricts rotation of the seat body. The vehicle seat according to claim 1,
A movable member attached to a direction including the gear forming member among the rotating portion and the fixed portion, and a fixed member attached to a direction including the drive gear;
The movable member moves together with the gear forming member when the seat body rotates to the first position and the gear forming member moves in the direction of the rotation restriction position with respect to the drive gear by the operation of the moving mechanism. And in the rotation direction of the said seat main body, it becomes the positional relationship which can be engaged with the said fixing member, The vehicle seat characterized by the above-mentioned. The vehicle seat according to claim 4,
The movable member receives an elastic force in a direction that can be engaged with the fixed member, and is connected to the gear forming member;
When the gear forming member moves in the direction of the rotation restriction position, the gear forming member moves in the direction of the elastic force and moves the movable member to a position that can be engaged with the fixed member.
The gear forming member reaches the position that can be engaged with the fixed member, and the gear forming member continues to move in the direction of the rotation restricting position with respect to the movable member held at the position. The vehicle seat, wherein the vehicle is separated and brought into a non-contact state. A vehicle seat according to any one of claims 4 and 5,
The movable member is attached to the rotating portion, and the fixed member is attached to the fixed portion;
A vehicle seat, wherein a bracket that covers the movable member from above and supports the fixed member is fixed to the fixed portion so as not to hinder the movement of the movable member.

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