JP2010274713A - Rotating device of vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To restrict the rotation range of outward rotation or inward rotation of a seat body in three steps. <P>SOLUTION: The operation of an angle adjustment lever 6A unlocks a rotation lock state of a rotation lock mechanism, allowing a seat body 1 to rotate within a first angle range A1 restricted by a first restriction mechanism. The operation of a child care mode changeover lever 6B unlocks the rotation lock state of the rotation lock mechanism and the restriction state of the first restriction mechanism, allowing the seat body 1 to rotate within a second angle range A2 restricted by a second restriction mechanism. The forward tilting of a seat back 2 caused by the operation of a reclining lever 6C unlocks the rotation lock state of the rotation lock mechanism and the restriction states of the first restriction mechanism and the second restriction mechanism, allowing the seat body 1 to rotate within a third angle range A3 restricted by a third restriction mechanism. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a vehicle seat rotation device. More specifically, the present invention relates to a vehicle seat rotation device that connects a seat body so as to be horizontally rotated outward or inward with respect to a floor.

  Conventionally, there is a vehicle seat that can be switched to a child care mode in which a child can be easily put on and off a child seat by rotating the seat body outward toward the entrance door. . Here, in the following Patent Document 1, in addition to the child care mode described above, it is also possible to switch to the facing mode in which the seat body is rotated 180 degrees in the opposite direction to face the rear seat. A vehicle seat is disclosed.

JP 2008-213613 A

  However, in the conventional technique disclosed above, the rotational posture mode of the seat body can be switched only from the normal front-facing initial mode to the child care mode and the opposite mode, which is improved in terms of convenience. There is room for it.

  The present invention has been devised as a solution to the above-described problems, and the problem to be solved by the present invention is to regulate the rotation range of the seat body outward rotation or inward rotation in three stages. There is to be able to do it.

In order to solve the above problems, the vehicle seat rotating apparatus of the present invention takes the following means.
A first aspect of the present invention is a vehicle seat rotation device for connecting a seat body so as to be horizontally rotated outward or inward with respect to a floor, the rotation stopping mechanism, and first to third It has a restriction mechanism and first to third operation members. The rotation stop mechanism stops the rotation of the seat body with respect to the floor. The first to third regulating mechanisms regulate the rotational movement range of the sheet main body within a predetermined angle range when the rotation prevention state by the rotation prevention mechanism is released. The first to third operation members are connected to at least one of the first to third restriction mechanisms and the rotation stop mechanism, respectively. When the operation members are not operated, the rotation prevention mechanism is held in a state where the rotation of the sheet body is stopped. When the first operating member is operated, the anti-rotation state of the anti-rotation mechanism is released, and the seat body can rotate and move within the first angle range restricted by the first restriction mechanism. Can be switched to. By operating the second operating member, the rotation stop state of the rotation stop mechanism is released, the restriction state of the first restriction mechanism is released, and the seat body is restricted by the second restriction mechanism. The state is switched to a state in which it can rotate within the second angle range. By operating the third operating member, the rotation stop state of the rotation stop mechanism is released, and the restriction states of the first and second restriction mechanisms are released, so that the seat body is moved by the third restriction mechanism. The state is switched to a state in which it can rotate within the restricted third angle range.

  According to the first aspect of the invention, the seat body can be rotated and moved within the first angular range regulated by the first regulating mechanism by operating the first operating member. Can be switched. Further, when the second operation member is operated, the seat main body is released from the restriction by the first restriction mechanism, and rotates within the second angle range restricted by the second restriction mechanism. Can be switched to In addition, the operation of the third operation member is performed on the seat body, so that the restriction by the first and second restriction mechanisms is released, and the seat body is within the third angle range restricted by the third restriction mechanism. It can be switched to a state where it can rotate. Thus, the rotation range of the outward rotation or the inward rotation of the seat body can be regulated in three stages.

  Next, according to a second aspect of the present invention, in the first aspect described above, the first angle range in which the rotational movement range of the seat body is regulated by the first regulating mechanism is a state in which the seat body faces the front side of the vehicle. It is set within the angle range to be maintained. The second angle range in which the rotational movement range of the seat body is regulated by the second regulating mechanism is an angle range in which the angular position of the seat body rotated outward and directed toward the door entrance / exit is the outward rotation regulation position. Is set. The third angular range in which the rotational movement range of the seat body is regulated by the third regulating mechanism is set to an angular range in which an angular position obtained by inverting the seat body to the vehicle rear side is a rotational regulation position.

  According to the second aspect of the invention, since the first angle range is set within the angle range that maintains the state in which the seat body faces the front side of the vehicle, the orientation of the seat body is slightly inward and outward of the vehicle. The tilt adjustment operation can be easily performed. In addition, the second angle range is set to an angle range in which the angle position toward the door entrance is determined by rotating the seat main body outward, so that the child can get on and off the child seat. The operation for switching to the child care mode can be simplified. Further, the third angular range is set to an angular range in which the angular position obtained by reversing the seat main body toward the vehicle rear side is a rotation restriction position, so that the seat main body faces the rear seat. Switching operation to the facing mode can be simplified.

  Next, according to a third aspect, in the first or second aspect described above, the seat body is provided by being connected to a rotating body that is rotatably assembled to a fixed body fixed on the floor. In each of the first to third regulating mechanisms, the contact member fixedly installed on the rotating body comes into contact with the contacted member provided on the fixed body, so that the rotational movement of the sheet main body is adjusted. It is configured to regulate at the contact position. One of the members to be abutted serves to restrict the rotational movement in one direction within any angular range of the seat body and to restrict the rotational movement in other directions within any other angular range. It has been configured.

  According to the third aspect of the invention, one of the contacted members constituting each of the first to third restriction mechanisms is configured to restrict rotational movement in one direction within any angular range of the seat body. By combining the configuration so as to restrict the rotational movement in the other direction within any other angle range, the number of parts can be rationalized and reduced.

1 is an exploded perspective view illustrating a configuration of a vehicle seat rotation device according to a first embodiment. It is an external view of a vehicle seat. It is explanatory drawing which showed the rotational movement range of the sheet | seat main body. It is the model showing the structure of the rotation stopping mechanism. It is a block diagram showing the structure of the rotation apparatus of a vehicle seat. It is a mimetic diagram showing the state where the seat body turned to the vehicle front side. It is the model showing the state which rotated the sheet | seat main body to the inward limit position in the 1st angle range. It is the model showing the state which rotated the sheet | seat main body to the outward limit position in the 1st angle range. It is the schematic diagram showing the state in which the seat body was rotated outward to enter the child care mode. It is the schematic diagram showing the state which rotated the sheet | seat main body outward and was made into opposing mode. It is a schematic diagram showing the initial state of a 1st control mechanism (2nd control mechanism). It is the schematic diagram showing the state by which the position fixed state of the 1st movable stopper (2nd movable stopper) was cancelled | released. It is the model showing the state which the 1st movable stopper (2nd movable stopper) swung and rotated.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing.

  First, the configuration of the vehicle seat rotating device according to the first embodiment will be described with reference to FIGS. As shown in FIG. 3, the vehicle seat rotating device according to the present embodiment is configured as a device that connects the seat body 1 so as to be horizontally rotated outward or inward with respect to the floor F. Specifically, the vehicle seat rotation device is normally held in a state in which the rotational movement of the seat body 1 is stopped, and each operation of three operation levers provided on the seat body 1 to be described later is performed. Thus, the seat body 1 can be switched to a state in which the seat body 1 can be rotated and moved within the first angle range A1, the second angle range A2, and the third angle range A3.

  Specifically, the first angle range A1 described above includes a rotational position in which the seat body 1 is rotated inward by 10.5 degrees from a state in which the seat body 1 is directed to the front of the vehicle, and 7 degrees outward from the front of the vehicle. The angle range between the rotated position and the rotated position is set. Within this angular range, the seat body 1 is maintained in a state of facing the front side of the vehicle, and its inward rotation causes the seated person's body to be directed to the seat next to it, so that It is possible to switch to a mode that facilitates interaction with the seat occupant (see FIG. 7).

  Further, as shown in FIG. 8, the seat main body 1 causes the seated person's body to face the window side of the door entrance and exit to view the scenery outside the vehicle by the outward rotation within the first angle range A1 described above. It is possible to switch to a mode that makes it easier. Returning to FIG. 3, the second angle range A2 is set to a range wider than the first angle range A1 described above, and the seat body 1 is set inwardly in the same manner as the first angle range A1. The angle range is set between a rotational position rotated by 5 degrees and a rotational position obtained by rotating the seat body 1 outward by 60 degrees from the front of the vehicle.

  Accordingly, by rotating the seat body 1 outwardly within the second angle range A2, as shown in FIG. 9, the seat body 1 is brought into a state (child care mode) facing the door entrance / exit. It is possible to easily carry the child on and off the child seat mounted on the seat body 1 from a position outside the vehicle standing at the door entrance. Returning to FIG. 3, the third angle range A3 is set to a wider range than the second angle range A2 described above, and the seat body 1 is directed inward in the same manner as the first angle range A1. The angle range is set between a rotational position rotated by 10.5 degrees and a rotational position obtained by rotating the seat body 1 outward 180 degrees from the front of the vehicle.

  Accordingly, by rotating the seat body 1 outwardly within the third angle range A3, as shown in FIG. 10, the seat body 1 is brought into a state facing the rear seat (opposite mode). It is possible to make the body of the seated person face the rear seat so that the user can easily interact with the seated person of the rear seat. By the way, as shown in FIG. 2, the switching operation of each rotation mode described above is performed by each operation of the angle adjustment lever 6A, the child care mode switching lever 6B and the reclining lever 6C provided on the seat body 1. It has become. Here, the angle adjusting lever 6A corresponds to the first operating member of the present invention, the child care mode switching lever 6B corresponds to the second operating member of the present invention, and the reclining lever 6C is the third operating member of the present invention. It corresponds to a member. The detailed relationship between the reclining lever 6C and the third operating member of the present invention will be described later.

  Here, the seat body 1 includes a seat back 2 that serves as a backrest, a seat cushion 3 that serves as a seating portion, and a headrest 4 that serves as a support for the head. The angle adjusting lever 6A described above is provided on the side of the seat cushion 3 on the outer side (door entrance / exit side) so that a seated person can perform an operation by pulling up while sitting on the seat body 1. Yes. The child care mode switching lever 6B is provided on the front surface of the seat cushion 3, and cannot be operated when the seated person is seated on the seat body 1, but the outside position where the operator stands at the door entrance / exit. It can be operated from.

  Further, the reclining lever 6C is provided on the outer side (door entrance / exit side) of the seat cushion 3, more specifically, on the rear side closer to the seated occupant's waist than the angle adjusting lever 6A described above. The user can perform the operation by pulling up while sitting on the seat body 1. By operating the reclining lever 6C, the fixed state (locked state) of the reclining device 5 on each side that fixes the backrest angle of the seat back 2 with respect to the seat cushion 3 is normally released, and the seat back 2 is backrested. It can be switched to an angle adjustable state.

  Here, the seat back 2 is always urged in a direction to rotate forward by an urging force of an urging spring (not shown) hooked between the seat back 2 and the seat cushion 3. As a result, the seat back 2 is folded down to a position where it is folded into the upper surface of the seat cushion 3 by urging when the reclining lever 6C is operated while the seated person is not seated on the seat body 1. It is like that.

  Hereinafter, a specific configuration of the vehicle seat rotating device described above will be described. Here, FIG. 1 shows the configuration of a vehicle seat rotating device interposed between the seat body 1 and the floor F. As shown in the figure, first, the seat body 1 is provided with a frame-shaped cushion frame 3A that forms a skeleton of the seat cushion 3 and is connected to the floor F via the rotary disk 10 and the lateral slider device 30. Yes. Here, the lateral slider device 30 is provided on the upper rail 32 and a pair of front and rear lower rails 31 that are integrally fixed on the floor F, a pair of front and rear upper rails 32 that are slidably mounted on the lower rails 31, and the upper rail 32. And a locking device (not shown) that locks the slide of the upper rail 32 by engagement with each lower rail 31.

  The above-described upper rail 32 is normally held in a state in which sliding movement in the vehicle width direction with respect to the lower rail 31 is restricted by a lock device (not shown) held in a locked state by urging. The upper rail 32 can be slid along the length direction (vehicle width direction) of the lower rail 31 by releasing the engagement lock state of the locking device described above by operating a release lever (not shown). Can be switched to.

  The upper rail 32 is returned to a state in which the sliding movement with respect to the lower rail 31 is restricted by releasing the operation of the release lever (not shown) and returning the lock device (not shown) to the locked state again by the biasing force. Are to be held. Next, the rotating disk 10 is configured by assembling a hollow disk-shaped fixed body 11 and a rotating body 12 up and down so that they can rotate relative to each other around a center point 10R.

  The above-described fixed body 11 is assembled to the upper surface portions of the upper and lower upper rails 32 before and after the horizontal slider device 30 and is integrally coupled to each upper rail 32. Specifically, the fixing body 11 is fastened by fitting and fastening each coupling pin 32A provided projecting from the upper surface portion of each upper rail 32 into each hole (not shown) formed in a recess in the bottom surface portion thereof. The upper rails 32 are integrally coupled to each other. Moreover, the rotary body 12 is assembled | attached to the bottom face part of both the side frames of above-described cushion frame 3A, and is integrally couple | bonded with cushion frame 3A.

  Specifically, the rotating body 12 is fastened by fitting each coupling pin 3D provided protruding from the bottom surface of both side frames of the cushion frame 3A into each fitting hole 12A formed in a recess on the upper surface. Thus, the cushion frame 3A is integrally coupled. Here, the rotating body 12 is formed by overlapping two upper and lower plate members having a large round opening at the center, and is formed between the inner peripheral edge portion of the upper plate member and the inner peripheral edge portion of the lower plate member. The outer peripheral edge of the fixed body 11 is fitted in the gap, and is assembled to the fixed body 11 in a rotatable state.

  In detail, the rotating body 12 is formed in a shape in which the inner peripheral edge of the lower plate member is bent upward in the shape of a bowl over the entire periphery, and the outer peripheral edge of the fixed body 11 is all. It is formed in a shape bent back downward in a bowl shape over the circumference. The rotating body 12 is set so that the outer peripheral edge portion of the fixed body 11 is overlapped on the inner peripheral edge portion formed in a bowl shape of the lower plate material, and the upper plate material is covered thereon. By being assembled in such a manner, it is assembled in a state in which it is supported on the inside and outside and above and below so as to be relatively rotatable with respect to the fixed body 11 and is prevented from being peeled off.

  Incidentally, as shown in FIG. 4, the above-described rotating body 12 is provided with a rotation stopping mechanism 40 that locks the relative rotation of the rotating body 12 by engagement with the fixed body 11. The anti-rotation mechanism 40 includes an arm-like hook 41 rotatably connected to the rotating body 12 by a support shaft 42, and a direction in which the hook 41 is always pressed against the fixed body 11 to be engaged and locked (clockwise in the figure). Direction) and a release cable 44 for operating the hook 41 in a direction (counterclockwise direction in the drawing) to release the engagement lock against the bias of the tension spring 43.

  The hook 41 described above has engagement teeth 41A that can be engaged with the engagement teeth 11B formed on the fixed body 11 at the tip of the arm, and is always engaged by the urging force of the tension spring 43. The teeth 41 </ b> A are held against the engaging teeth 11 </ b> B of the fixed body 11. Here, the engaging teeth 11B of the fixed body 11 are formed so that the rotating movement of the rotating body 12 can be locked by engaging the engaging teeth 41A of the hook 41 when the seat body 1 is in the rotation position state shown below. Has been.

  That is, the engaging teeth 11B of the fixed body 11 are positions where the movement of rotating the seat body 1 outward or inward within the first angle range A1 described above can be rotationally locked at a pitch of 3.5 degrees. Is formed. As a result, the seat body 1 is rotated by 7 degrees outwardly from the front of the vehicle, three rotational positions from the rotational position facing the front of the vehicle, three rotational positions from this position to the position rotated by 10.5 degrees inward. The rotation is locked at two rotational positions up to the predetermined position.

  In addition, the engaging teeth 11B of the fixed body 11 can be connected to the rotating body 12 (seat body 1) even at a rotational position (within the second angle range A2) in which the seat body 1 is rotated 60 degrees outward from the front of the vehicle. It is formed at a position where the rotational movement can be locked. As a result, the seat body 1 is rotationally locked in a state where it is in the child care mode directed to the door entrance by the rotation of 60 degrees outward.

  In addition, the engaging teeth 11B of the fixed body 11 can be connected to the rotating body 12 (seat body 1) even at a rotational position (within the third angle range A3) where the seat body 1 is rotated 180 degrees outward from the front of the vehicle. It is formed at a position where the rotational movement can be locked. As a result, the seat body 1 is rotationally locked in a state in which the seat body 1 is in the facing mode directed toward the rear seat by rotation of 180 degrees outward.

  When the release cable 44 is operated and the engagement lock state of the hook 41 with respect to the fixed body 11 is released, the rotation stop mechanism 40 is switched to a state in which the rotary body 12 can be rotated. Is rotated to a desired rotational position, and then the operation of the release cable 44 is released, so that the hook 41 is returned to a state of being engaged and locked with the fixed body 11 by urging. Here, the release cable 44 is connected to each operation lever of the angle adjustment lever 6A, the child care mode switching lever 6B, and the reclining lever 6C shown in FIG. 2, and by operating any one of the operation levers, The hook 41 is operated so as to release the engagement lock with respect to the fixed body 11.

  By the way, the above-described sheet main body 1 is switched to a state in which the sheet main body 1 can be rotated, and can be rotated within the first angle range A1, or rotated within the second angle range A2. Each of the operations for rotating the lens 3 within the angular range A3 is performed by the operations of the angle adjustment lever 6A, the child care mode switching lever 6B, and the reclining lever 6C described above with reference to FIG.

  Hereinafter, a structure in which the rotatable range of the sheet body 1 can be switched by the operation of each of the three operation levers described above will be described. Here, as shown in FIG. 1, the fixed body 11 of the rotating disk 10 described above includes a fixed stopper 21 </ b> B that can restrict the rotational movement of the rotating body 12 (sheet body 1) by contact, and the first movable body. A cancel mechanism 20 including a stopper 22 and a second movable stopper 25 is provided. Further, on both side frames of the cushion frame 3A integrally coupled to the rotating body 12, there are provided contact plates 3B and 3C which are contact members with the respective stoppers. Here, each of the contact plates 3B and 3C corresponds to a contact member of the present invention, and each of the fixed stopper 21B, the first movable stopper 22 and the second movable stopper 25 corresponds to a contacted member of the present invention.

  The cancel mechanism 20 described above is provided with a base plate 21 on which a fixed stopper 21B is formed, and an operating structure that is provided on the upper surface of the base plate 21 and that fixes and releases the position of the first movable stopper 22. The first restriction mechanism 20 </ b> A and a second restriction mechanism 20 </ b> B having an operation structure for fixing and releasing the position of the second movable stopper 25 are provided. The base plate 21 described above is provided integrally coupled to the fixed body 11.

  Specifically, the base plate 21 is fastened by fitting the coupling pins 11A provided protruding from the bottom surface portion of the fixed body 11 into the plurality of fitting holes 21A formed on the upper surface portion thereof. The fixed body 11 is integrally coupled. The first restricting mechanism 20A includes a first movable stopper 22, a first locking arm 23, and a first fixed plate 24, and the second restricting mechanism 20B includes a second restricting mechanism 20B. The movable stopper 25, the second locking arm 26, and the second fixed plate 27 are configured.

  As shown in FIG. 6, the first movable stopper 22 is fixed to the base plate 21 with the above-described one contact plate 3 </ b> B when the seat body 1 is in the arrangement state facing the front of the vehicle. It is in a state of being positioned between the stopper 21B. And this 1st movable stopper 22 is always hold | maintained in the state where the position was fixed by 20 A of 1st control mechanisms, and as shown in FIG. The rotational movement in the clockwise direction is regulated by contacting the contact plate 3B.

  Further, as shown in FIG. 7, the movement of rotating the seat body 1 in the clockwise direction shown in FIG. 7 from the state facing the front of the vehicle in FIG. 6 is performed by the above-described contact plate 3B and the fixed stopper 21B. It can be stopped at the abutting position. With the above configuration, a stopper structure that restricts the rotational movement of the sheet body 1 within the first angle range A1 between 7 degrees outward and 10.5 degrees inward is configured.

  Next, returning to FIG. 6, the second movable stopper 25 is configured such that when the seat body 1 is in the arrangement state facing the front of the vehicle, the other contact plate 3 </ b> C is placed between the second movable stopper 25 and the first movable stopper 22. It is in a state of being positioned. The second movable stopper 25 is normally held in a position fixed by the second restricting mechanism 20B, and as shown in FIG. The rotational movement in the clockwise direction can be restricted by contacting the contact plate 3C.

  Here, the position fixing state of the first movable stopper 22 by the first restricting mechanism 20A described above is released by operating the child care mode switching lever 6B described above with reference to FIG. Therefore, when the child care mode switching lever 6B is operated and the seat body 1 is rotated, the first movable stopper 22 remains in contact with the first movable stopper 22 even if one of the above-described one of the contact plates 3B contacts the first movable stopper 22. By being pushed away by 3B, the rotational movement of the sheet main body 1 can be performed up to a position where the other abutting plate 3C comes into contact with and locks against the second movable stopper 25 in the counterclockwise direction in the figure.

  With the above configuration, a stopper structure that restricts the rotational movement of the sheet body 1 to 60 degrees outward, which is the limit position within the second angle range A2, is configured. Then, the fixed position of the second movable stopper 25 by the second restriction mechanism 20B described above is released by the operation of folding the seat back 2 on the upper surface of the seat cushion 3 by the operation of the reclining lever 6C described above with reference to FIG. It is designed to be operated.

  Further, the above-described fixed position of the first movable stopper 22 by the first restricting mechanism 20A is also released by the above-described operation of folding the seat back 2. Therefore, when the seat back 2 is folded by the operation of the reclining lever 6C and the seat body 1 is rotated outward, the one contact plate 3B contacts the first movable stopper 22 as described above. Even if the other contact plate 3C comes into contact with the second movable stopper 25, the first movable stopper 22 and the second movable stopper 25 are pushed away by the respective contact plates 3B and 3C, and the rotational movement of the sheet body 1 is caused. The other contact plate 3C can be moved to a position where it comes into contact with and is locked in the counterclockwise direction shown in the figure with the aforementioned fixed stopper 21B (see FIG. 10).

  Thereby, the rotational movement of the sheet body 1 can be performed up to 180 degrees outward, which is the limit position within the third angle range A3. Thus, in the present embodiment, the fixed stopper 21B causes the angular position for restricting the clockwise movement of the contact plate 3B (sheet body 1) in the illustrated clockwise direction and the illustrated counterclockwise direction of the contact plate 3C (sheet body 1). A third restricting mechanism for restricting the rotational movement of the sheet main body 1 is configured within a third angle range A3 between the angular position for restricting the rotational movement of the sheet body. FIG. 5 shows a block diagram of a configuration in which the rotatable range of the sheet body 1 can be switched by operating the three operation levers described above.

  Subsequently, a configuration of the first restriction mechanism 20A for fixing and releasing the position of the first movable stopper 22 and the second restriction mechanism 20B for fixing and releasing the position of the second movable stopper 25 described above. explain. Since the first restriction mechanism 20A and the second restriction mechanism 20B have the same basic configuration, the configuration of the second restriction mechanism 20B will be described below in parentheses. Will be explained together.

  Here, as shown in FIG. 11, the first restriction mechanism 20A (second restriction mechanism 20B) includes a first movable stopper 22 (second movable stopper 25) and a first locking arm 23 (second relation). The stop arm 26) and the first fixing plate 24 (second fixing plate 27) are configured. The first fixing plate 24 (second fixing plate 27) is integrally connected to the base plate 21. The first movable stopper 22 (second movable stopper 25) and the first locking arm 23 (second locking arm 26) are respectively between the base plate 21 and the first fixed plate 24 (second fixed plate 27). The shafts 22A and 23A (support shafts 25A and 26A) are rotatably connected to the base plate 21 and the first fixed plate 24 (second fixed plate 27), respectively. ing.

  The above-described first movable stopper 22 (second movable stopper 25) is normally applied to the contact plate 3B (the contact plate 3C) by the elastic force of the tension spring 22C (the tension spring 25C) hooked between the base plate 21 and the first movable stopper 22 (second movable stopper 25). ) Is held in a posture state (initial state) in contact with the abutting plate 3B (the abutting plate 3C) when rotating. On the other hand, the first latching arm 23 (second latching arm 26) is normally also the tension spring 23C (tension spring 26C) hooked between the first fixing plate 24 (second fixing plate 27). A posture in which a corner portion 23B (corner portion 26B) formed in a part of the shape is opposed to a corner portion 22B of the first movable stopper 22 (a corner portion 25B of the second movable stopper 25) in the rotational direction by an elastic force. Held in a state.

  As a result, the first locking arm 23 (second locking arm 26) has the first movable stopper 22 (second movable stopper 25) pressed against the abutting plate 3B (abutting plate 3C) in the counterclockwise direction shown in the figure. The movement to be rotated is regulated by abutting the corner 23B (corner 26B). And, by this restricting structure, the rotation movement of the contact plate 3B (the contact plate 3C) in the counterclockwise direction (movement of the sheet body 1 in the outward rotation direction) is the first movable stopper 22 (second movable stopper 25). It is regulated at the position where it abuts. The rotation restriction state of the first movable stopper 22 by the first locking arm 23 is that the child care mode switching lever 6B described above is operated, or the reclining lever 6C is operated and the seat back 2 is tilted forward. Is to be released by. The rotation restricting state of the second movable stopper 25 by the second locking arm 26 is released only when the reclining lever 6C is operated and the seat back 2 moves forward.

  Specifically, by performing the above-described operation, the first cable 23D (second cable 26D) connected to the first locking arm 23 (second locking arm 26) is pulled, and the first operation is performed. The locking arm 23 (second locking arm 26) is operated in the counterclockwise direction in the figure, and the corner 23B (corner portion 26B) is changed to the corner 22B of the first movable stopper 22 (corner of the second movable stopper 25). 25B). Accordingly, as shown in FIG. 12, the first movable stopper 22 (second movable stopper 25) is pushed in the same direction by being pressed counterclockwise by the abutting plate 3B (abutting plate 3C). It is turned and it will be in the state which escapes the motion of the contact plate 3B (contact plate 3C).

  The function of restricting the rotation of the first movable stopper 22 (second movable stopper 25) by the first locking arm 23 (second locking arm 26) is the first movable stopper 22 (second movable stopper 25). ) Does not work when pressed in the clockwise direction in the figure by the contact plate 3B (the contact plate 3C). Specifically, as shown in FIG. 13, when the first movable stopper 22 (second movable stopper 25) is pressed in the clockwise direction in the figure by the contact plate 3 </ b> B (the contact plate 3 </ b> C), the first movable stopper 22. The corner portion 22B (corner portion 25B of the second movable stopper 25) rotates in a direction away from the corner portion 23B of the first locking arm 23 (corner portion 26B of the second locking arm 26), and thus the first movable The stopper 22 (second movable stopper 25) is in a state where the stopper plate 22 (the second movable stopper 25) rotates in an idling manner so that the movement of the contact plate 3B (the contact plate 3C) is released.

  Thus, according to the vehicle seat rotation device of the present embodiment, the seat body 1 is regulated by the first regulating mechanism 20A when the angle adjusting lever 6A (first operating member) is operated. It is switched to a state in which it can rotate within the first angle range A1 (see FIGS. 7 and 8). Further, when the child care mode switching lever 6B (second operation member) is operated, the seat body 1 is released from the restriction by the first restriction mechanism 20A and is restricted by the second restriction mechanism 20B. In addition, it is switched to a state in which it can rotate within the second angle range A2 (see FIG. 9).

  The seat body 1 is regulated by the first and second regulating mechanisms 20A and 20B when the seat back 2 is tilted forward (corresponding to the manipulation of the third operating member) by the operation of the reclining lever 6C. The state is released, and the state is switched to a state in which it can rotate within the third angle range A3 regulated by the fixed stopper 21B (corresponding to the third regulating mechanism) (see FIG. 10). Thus, according to the configuration of the present embodiment, the rotation range of the outward rotation or the inward rotation of the seat body 1 can be regulated in three stages.

  Further, as in this embodiment, the first angle range A1 is set within an angle range that maintains the state in which the seat body 1 faces the front side of the vehicle. An adjustment operation (see FIGS. 7 and 8) that is slightly tilted can be easily performed. Further, the second angular range A2 is set to an angular range in which the angular position (see FIG. 9) directed to the door entrance by rotating the seat main body 1 outward is set as the outward rotation restricting position. The operation for switching to the child care mode, which can easily put the child on and off the child seat, can be simplified.

  Further, the third angle range A3 is set to an angle range in which an angular position (see FIG. 10) where the seat body 1 is reversed to the vehicle rear side is set as a rotation restriction position. It is possible to simplify the switching operation to the facing mode in which the sheet faces the sheet. Further, one of the contacted members (fixed stopper 21 </ b> B) constituting each of the first to third regulating mechanisms is used to regulate the inward rotation of the sheet main body 1 and switch to the facing mode of the sheet main body 1. By combining the configuration so as to restrict the outward rotation at the time, the number of parts can be rationalized and reduced.

  As mentioned above, although the embodiment of the present invention has been described using one example, the present invention can be implemented in various forms in addition to the above example. For example, in the above embodiment, as shown in FIG. 3, the second angle range A2 and the third angle range A3 are set so as to spread in the direction in which the seat body 1 is rotated outward from the vehicle front direction. Although shown, the sheet body 1 may be set so as to spread in the direction in which the sheet body 1 is rotated inward or in both directions.

  Each of the first to third angle ranges can be set to a free angle range according to the purpose of use of the seat body 1, and each of the first to third angle ranges must be limited to a specific angle range. Absent. Further, in the above embodiment, the rotation range of the sheet body 1 can be regulated in three stages by using the operation lever properly, but the fourth regulation mechanism, the fifth regulation mechanism,... Thus, by increasing the number of restriction mechanisms, the rotation range of the sheet main body 1 can be regulated in more stages.

DESCRIPTION OF SYMBOLS 1 Seat body 2 Seat back 3 Seat cushion 3A Cushion frame 3B Abutting plate (contact member)
3C Contact plate (contact member)
3D connecting pin 4 headrest 5 reclining device 6A angle adjustment lever (first operation member)
6B Child care mode switching lever (second operating member)
6C Reclining lever (third operating member)
DESCRIPTION OF SYMBOLS 10 Rotating disk 10R Center point 11 Fixed body 11A Coupling pin 11B Engagement tooth 12 Rotating body 12A Fitting hole 20 Cancel mechanism 20A 1st control mechanism 20B 2nd control mechanism 21 Base plate 21A Fitting hole 21B Fixed stopper (covered Abutting member, third regulating mechanism)
22 First movable stopper (contacted member)
22A support shaft 22B corner portion 22C tension spring 23 first locking arm 23A support shaft 23B corner portion 23C tension spring 23D first cable 24 first fixed plate 25 second movable stopper (contact member)
25A support shaft 25B corner portion 25C tension spring 26 second locking arm 26A support shaft 26B corner portion 26C tension spring 26D second cable 27 second fixing plate 30 horizontal slider device 31 lower rail 32 upper rail 32A coupling pin 40 anti-rotation mechanism 41 hook 41A Engagement teeth 42 Support shaft 43 Tension spring 44 Release cable A1 First angle range A2 Second angle range A3 Third angle range F Floor

Claims (3)

A vehicle seat rotating device that connects a seat main body so as to be horizontally rotated outward or inward with respect to a floor,
An anti-rotation mechanism for anti-rotating the seat body with respect to the floor;
First to third restriction mechanisms for restricting the rotational movement range of the seat body when the rotation prevention state by the rotation prevention mechanism is released within a predetermined angle range;
First to third operation members respectively connected to at least one of the first to third regulating mechanisms and the rotation stopping mechanism;
When the operation members are not operated, the rotation prevention mechanism is held in a state in which the rotation of the sheet main body is stopped. When the first operation member is operated, the rotation prevention mechanism is not rotated. Is released, the seat body is switched to a state in which it can rotate within a first angle range regulated by the first regulation mechanism, and the second operation member is operated to operate the rotation. The rotation stop state of the stop mechanism is released, the restriction state of the first restriction mechanism is released, and the seat body rotates and moves within the second angle range restricted by the second restriction mechanism. When the third operation member is operated, the rotation prevention state of the rotation prevention mechanism is released and the first and second restrictions are switched. The vehicle seat rotation device is released so that the seat body is switched to a state in which the seat body can rotate and move within a third angle range regulated by the third regulation mechanism. . The vehicle seat rotating device according to claim 1,
The first angle range for restricting the rotational movement range of the seat body by the first restriction mechanism is set within the angle range for maintaining the state in which the seat body faces the front side of the vehicle, and the second restriction range. The second angle range that restricts the rotational movement range of the seat body by the mechanism is set to an angle range in which the seat body is rotated outward and the angle position toward the door entrance is set as the outward rotation restriction position. The third angle range in which the rotational movement range of the seat body is regulated by the third regulating mechanism is set to an angular range in which an angular position obtained by inverting the seat body to the vehicle rear side is a rotation regulation position. A vehicle seat rotating device characterized by the above. The vehicle seat rotating device according to claim 1 or 2,
The seat body is provided to be connected to a rotating body rotatably assembled to a fixed body fixed on the floor, and each of the first to third regulating mechanisms is fixedly installed on the rotating body. The contact member is configured to restrict the rotational movement of the sheet body at each contact position by contacting the contacted member provided on the fixed body. One is a structure in which the restriction of rotational movement in one direction within any angular range of the seat body and the restriction of rotational movement in other directions within any other angular range are combined. A vehicular seat rotation device.

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